Company Details
vivo-telefonicabr
38,994
1,549,172
517
vivo.com.br
0
VIV_1616504
In-progress


Vivo (Telefônica Brasil) Vendor Cyber Rating & Cyber Score
vivo.com.brVivo (Telefônica Brasil) is part of the Telefónica Group and with more than 94 million customers, of which 75 million mobile and 19 million fixed, we are the largest telecommunications company in Brazil, with nationwide presence and a complete, convergent portfolio of products, combining fixed, mobile and digital services. Our purpose is “Digitalize to Bring Closer”, helping to build a digital nation and transforming the life of our customers. More and more, we connect people and things with Fiber, 4G and 4.5G and cover more cities with the network quality that only Vivo has. Today, we cover around 90% of the population with 4G and are accelerating the launch of cities with 4.5G, using carrier aggregation technology. In the fixed operation, we ended 2019 with 21 million homes-passed (HPs) with fiber optic technology, of which 11 million HPs with FTTH (fiber to the home). In addition, all cities with FTTH technology also offer TV over fiber (IPTV), aiming to offer the best speed and experience to our consumers. At Vivo, we also do more than just telecommunications. Within the Group, we have the Telefônica Vivo Foundation, that is committed to making education a priority, developing projects that are based on human potential and use technology as an instrument in favor of inclusion and digital culture.
Company Details
vivo-telefonicabr
38,994
1,549,172
517
vivo.com.br
0
VIV_1616504
In-progress
Between 800 and 849

V Global Score (TPRM)XXXX

Description: Movistar Fined €300,000 for GDPR Violation in Spain On December 22, 2025, Spain’s Data Protection Agency (AEPD) imposed a €300,000 fine on Telefónica Móviles, operating as Movistar, for violating the EU’s General Data Protection Regulation (GDPR). The penalty stems from the unlawful processing of personal data during a mobile phone line transfer, where customer information was mishandled. The AEPD ruled that Movistar failed to comply with GDPR requirements, though the company has one month to appeal the decision. The case highlights ongoing regulatory scrutiny over telecom providers’ data handling practices under EU privacy laws. Full details of the ruling are available in the attached decision (in Spanish).
Description: Cybercriminal Dedale Targets BarcelonaTelefónica, Leaks 1M Peruvian Customer Records BarcelonaTelefónica is probing a cyberattack by the threat actor Dedale, who claims to have accessed 22 million customer records though the breach appears limited in scope. As proof, the attacker leaked a database containing one million records, primarily affecting users in Peru. The compromised data includes multiple entries per customer (e.g., names, ID numbers, addresses), meaning the incident does not equate to 22 million unique individuals being exposed. Telefónica confirmed that Spanish customers remain unaffected, as the breach is tied to its former Peruvian subsidiary. The attack surfaced after HackManac disclosed details on X (formerly Twitter). Notably, Dedale is demanding a $1,500 ransom a fraction of typical extortion demands raising questions about the attacker’s motives. The breach coincides with Telefónica’s recent sale of its bankrupt Peruvian operations to Integra Tec International for €900,000, finalized last month. Investigations are ongoing.
Description: A cybercriminal known as Rey, part of the Hellcat ransomware operation, claims to have stolen 106GB of sensitive data from Telefónica in May 2025. The stolen data includes internal communications, purchase orders, logs, customer records, and various employee data. Rey has released a 2.6GB sample and is threatening to release the full batch unless a payment is made. Telefónica has downplayed the incident, stating that the data is old and there was no new breach.


No incidents recorded for Vivo (Telefônica Brasil) in 2026.
No incidents recorded for Vivo (Telefônica Brasil) in 2026.
No incidents recorded for Vivo (Telefônica Brasil) in 2026.
V cyber incidents detection timeline including parent company and subsidiaries

Vivo (Telefônica Brasil) is part of the Telefónica Group and with more than 94 million customers, of which 75 million mobile and 19 million fixed, we are the largest telecommunications company in Brazil, with nationwide presence and a complete, convergent portfolio of products, combining fixed, mobile and digital services. Our purpose is “Digitalize to Bring Closer”, helping to build a digital nation and transforming the life of our customers. More and more, we connect people and things with Fiber, 4G and 4.5G and cover more cities with the network quality that only Vivo has. Today, we cover around 90% of the population with 4G and are accelerating the launch of cities with 4.5G, using carrier aggregation technology. In the fixed operation, we ended 2019 with 21 million homes-passed (HPs) with fiber optic technology, of which 11 million HPs with FTTH (fiber to the home). In addition, all cities with FTTH technology also offer TV over fiber (IPTV), aiming to offer the best speed and experience to our consumers. At Vivo, we also do more than just telecommunications. Within the Group, we have the Telefônica Vivo Foundation, that is committed to making education a priority, developing projects that are based on human potential and use technology as an instrument in favor of inclusion and digital culture.

We are driving the digital transition of Italy and Brazil with innovative technologies and services because we want to contribute to accelerating the sustainable growth of the economy and society by bringing value and prosperity to people, companies and institutions. We offer diversified solutions

The future of mobile isn’t on the horizon, it’s happening now. At Ericsson, we’re building the foundation for an open network ecosystem where industries, developers, and enterprises thrive. The convergence of 5G, AI, cloud, and network APIs isn’t just a technological shift; it’s a transformation th

EMPOWERING SOCIETIES. CONNECTING YOU TO WHAT MATTERS MOST. Telenor Group is a leading telecommunications company across the Nordics and Asia with 158 million subscribers and annual sales of around NOK 99 billions (2022). We are committed to responsible business conduct and driven by the ambition
Huawei is a leading global provider of information and communications technology (ICT) infrastructure and smart devices. With integrated solutions across four key domains – telecom networks, IT, smart devices, and cloud services – we are committed to bringing digital to every person, home and organi

ACN is the leading direct selling telecommunications and essential services provider. ACN Inc. was founded in 1993 by four entrepreneurs and is now operating in North America. ACN offers essential products and services that people use every day, while also offering a powerful business ownership oppo

Rogers is Canada’s communications and entertainment company, driven to connect and entertain Canadians. For more information, please visit rogers.com or investors.rogers.com. Déterminée à connecter et à divertir les Canadiens et Canadiennes, Rogers est la référence canadienne en matière de commu
Tata Communications is a digital ecosystem enabler that powers today’s fast-growing digital economy. We enable the digital transformation of enterprises globally, including 300 of the Fortune 500. We carry around 30% of the world’s internet routes and connects businesses to 60% of the world’s cloud

TM is the national connectivity and digital infrastructure provider and Malaysia’s leading integrated telco; offering a comprehensive suite of communication services and solutions in fixed (telephony and broadband), mobility, content, WiFi, ICT, Cloud and smart services. TM is driven by stakeholder

Zain Group is a leading provider of innovative ICT technologies & digital lifestyle communications operating in 8 markets across the Middle East & Africa, serving 51.3 million active customers as of 30 September 2025. Zain provides mobile voice, data and B2B services in: Kuwait, Bahrain, Iraq, Jorda
.png)
Telefonica Brasil (ADR), ISIN: US92662Q1058, navigates challenging market conditions in Brazil with slowing GDP growth and intensifying...
Market-leader Telefónica|Vivo remains keen to mop up smaller competitors in Brazil's highly crowded fibre space, as it ramps use of next-gen...
Telefónica Tech sold its Peruvian subsidiary and completed divestments in the region, while reorganizing operations in Brazil and...
Brazil's Vivo buys back cybersecurity unit from Telefónica ... Telefónica|Vivo has re-acquired parent Telefónica's Brazilian cybersecurity unit,...
Telefonica Brasil's subsidiary TIS finalised the acquisition of CyberCo Brasil from TTech. The deal is valued at up to BRL 232 million,...
FY25–FY30 Transform & Grow strategy deep dive: Group's new leadership goes more aggressive and old school with new five-year agenda,...
M&A speculation continues to dominate the discourse around Telefónica, ahead of early-November's strategy update, with the focus in recent...
Telefónica|Vivo has closed a BRL 3.8bn (€600m) Internet of Things contract with public sanitation services provider Sabesp, which will see...
Telefônica Brasil dominates Brazil's telecom market with rapid 5G expansion, strong financial growth, and an expanding fintech ecosystem.

Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Vivo (Telefônica Brasil) is http://www.vivo.com.br.
According to Rankiteo, Vivo (Telefônica Brasil)’s AI-generated cybersecurity score is 800, reflecting their Good security posture.
According to Rankiteo, Vivo (Telefônica Brasil) currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Vivo (Telefônica Brasil) has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.
According to Rankiteo, Vivo (Telefônica Brasil) is not certified under SOC 2 Type 1.
According to Rankiteo, Vivo (Telefônica Brasil) does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Vivo (Telefônica Brasil) is not listed as GDPR compliant.
According to Rankiteo, Vivo (Telefônica Brasil) does not currently maintain PCI DSS compliance.
According to Rankiteo, Vivo (Telefônica Brasil) is not compliant with HIPAA regulations.
According to Rankiteo,Vivo (Telefônica Brasil) is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Vivo (Telefônica Brasil) operates primarily in the Telecommunications industry.
Vivo (Telefônica Brasil) employs approximately 38,994 people worldwide.
Vivo (Telefônica Brasil) presently has no subsidiaries across any sectors.
Vivo (Telefônica Brasil)’s official LinkedIn profile has approximately 1,549,172 followers.
Vivo (Telefônica Brasil) is classified under the NAICS code 517, which corresponds to Telecommunications.
No, Vivo (Telefônica Brasil) does not have a profile on Crunchbase.
Yes, Vivo (Telefônica Brasil) maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/vivo-telefonicabr.
As of April 02, 2026, Rankiteo reports that Vivo (Telefônica Brasil) has experienced 3 cybersecurity incidents.
Vivo (Telefônica Brasil) has an estimated 10,042 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Ransomware and Breach.
Total Financial Loss: The total financial loss from these incidents is estimated to be $300 thousand.
Detection and Response: The company detects and responds to cybersecurity incidents through an incident response plan activated with null, and third party assistance with null, and law enforcement notified with null, and containment measures with null, and remediation measures with null, and recovery measures with null, and communication strategy with null, and adaptive behavioral waf with null, and on demand scrubbing services with null, and network segmentation with null, and enhanced monitoring with null..
Title: Telefónica Data Breach Incident
Description: A threat actor claims to have stolen 106GB of sensitive files from Telefónica. The company asserts the files were old and stolen from a previous incident. A sample was shared with the media, with the full batch soon to follow.
Date Detected: null
Date Publicly Disclosed: null
Date Resolved: null
Type: Data Breach
Attack Vector: Internal Jira development and ticketing server
Vulnerability Exploited: null
Threat Actor: Hellcat ransomware operation, alias Rey
Motivation: Ransom
Title: Telefónica Móviles (Movistar) GDPR Violation Fine
Description: Telefónica Móviles, operating under the brand name Movistar, was fined €300,000 for breaching the EU’s GDPR data protection rules. The fine was imposed due to unlawful processing of data when an individual’s mobile phone line was changed.
Date Publicly Disclosed: 2025-12-22
Type: Data Breach
Title: Cyberattack on BarcelonaTelefónica by Dedale
Description: BarcelonaTelefónica is investigating a cyberattack carried out by cybercriminal Dedale, through which he allegedly gained illicit access to 22 million customer records. The perpetrator has leaked, as evidence, a database with one million records. The leaked database contains data from users in Peru, and the company assures that this attack would not affect customers in Spain.
Type: Data Breach
Threat Actor: Dedale
Motivation: Extortion
Common Attack Types: The most common types of attacks the company has faced is Breach.
Identification of Attack Vectors: The company identifies the attack vectors used in incidents through Internal Jira development and ticketing server.

Financial Loss: null
Data Compromised: 106GB of sensitive files, including internal communications, purchase orders, logs, customer records, and employee data
Systems Affected: Internal Jira development and ticketing server
Downtime: null
Operational Impact: null
Conversion Rate Impact: null
Revenue Loss: null
Customer Complaints: null
Brand Reputation Impact: null
Legal Liabilities: null
Identity Theft Risk: null
Payment Information Risk: null

Financial Loss: €300,000
Data Compromised: Personal data processed unlawfully during mobile phone line changes
Brand Reputation Impact: Potential reputational damage due to GDPR violation
Legal Liabilities: Regulatory fine imposed

Data Compromised: 22 million customer records accessed, 1 million records leaked
Identity Theft Risk: High
Average Financial Loss: The average financial loss per incident is $100.00 thousand.
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Internal communications, purchase orders, logs, customer records, and employee data, Personal data, Full Name, Id Number, Address and .

Entity Name: Telefónica
Entity Type: Telecommunications Company
Industry: Telecommunications
Location: Spain
Size: null
Customers Affected: null

Entity Name: Telefónica Móviles (Movistar)
Entity Type: Telecommunications
Industry: Telecommunications
Location: Spain

Entity Name: Movistar Peru (formerly Telefónica Peru)
Entity Type: Subsidiary
Industry: Telecommunications
Location: Peru
Customers Affected: Users in Peru (up to 22 million records)

Incident Response Plan Activated: null
Third Party Assistance: null
Law Enforcement Notified: null
Containment Measures: null
Remediation Measures: null
Recovery Measures: null
Communication Strategy: null
Adaptive Behavioral WAF: null
On-Demand Scrubbing Services: null
Network Segmentation: null
Enhanced Monitoring: null
Incident Response Plan: The company's incident response plan is described as null.
Third-Party Assistance: The company involves third-party assistance in incident response through null.

Type of Data Compromised: Internal communications, purchase orders, logs, customer records, and employee data
Number of Records Exposed: 380,000 files
Sensitivity of Data: Sensitive
Data Exfiltration: 106GB
Data Encryption: null
File Types Exposed: Invoices, email addresses, internal communications, purchase orders, logs, customer records, and employee data
Personally Identifiable Information: Email addresses, invoices for business partners or customers

Type of Data Compromised: Personal data
Sensitivity of Data: High (GDPR-protected data)
Personally Identifiable Information: Yes

Type of Data Compromised: Full name, Id number, Address
Number of Records Exposed: 1 million records leaked (22 million accessed)
Sensitivity of Data: High (Personally Identifiable Information)
Data Exfiltration: Yes
Personally Identifiable Information: Yes
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: null.
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by null.

Ransom Demanded: null
Ransom Paid: null
Ransomware Strain: Hellcat
Data Encryption: null
Data Exfiltration: 106GB
Data Recovery from Ransomware: The company recovers data encrypted by ransomware through null.

Regulations Violated: null
Fines Imposed: null
Legal Actions: null
Regulatory Notifications: null

Regulations Violated: GDPR,
Fines Imposed: €300,000
Legal Actions: Decision can be appealed within one month
Regulatory Notifications: Spanish Data Protection Agency
Ensuring Regulatory Compliance: The company ensures compliance with regulatory requirements through null, Decision can be appealed within one month.

Lessons Learned: null

Recommendations: null
Key Lessons Learned: The key lessons learned from past incidents are null.
Implemented Recommendations: The company has implemented the following recommendations to improve cybersecurity: null.

Source: HackManac
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: BleepingComputerUrl: nullDate Accessed: null, and Source: MLexDate Accessed: 2025-12-22, and Source: HackManac.

Investigation Status: null

Investigation Status: Completed (decision issued)

Investigation Status: Ongoing
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through null.
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were null and null.

Entry Point: Internal Jira development and ticketing server
Reconnaissance Period: null
Backdoors Established: null
High Value Targets: null
Data Sold on Dark Web: null

Root Causes: Unlawful processing of personal data during mobile phone line changes
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as null, null.
Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: null.
Ransom Payment History: The company has Paid ransoms in the past.
Last Ransom Demanded: The amount of the last ransom demanded was null.
Last Attacking Group: The attacking group in the last incident were an Hellcat ransomware operation, alias Rey and Dedale.
Most Recent Incident Detected: The most recent incident detected was on null.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2025-12-22.
Most Recent Incident Resolved: The most recent incident resolved was on null.
Most Significant Data Compromised: The most significant data compromised in an incident were 106GB of sensitive files, including internal communications, purchase orders, logs, customer records, and employee data, Personal data processed unlawfully during mobile phone line changes, 22 million customer records accessed and 1 million records leaked.
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was null.
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident was null.
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were 22 million customer records accessed, 1 million records leaked, Personal data processed unlawfully during mobile phone line changes, 106GB of sensitive files, including internal communications, purchase orders, logs, customer records and and employee data.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 23.4M.
Highest Ransom Paid: The highest ransom paid in a ransomware incident was null.
Highest Fine Imposed: The highest fine imposed for a regulatory violation was null, €300,000.
Most Significant Legal Action: The most significant legal action taken for a regulatory violation was null, Decision can be appealed within one month.
Most Significant Lesson Learned: The most significant lesson learned from past incidents was null.
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was null.
Most Recent Source: The most recent source of information about an incident are HackManac, BleepingComputer and MLex.
Most Recent URL for Additional Resources: The most recent URL for additional resources on cybersecurity best practices is null .
Current Status of Most Recent Investigation: The current status of the most recent investigation is null.
Most Recent Stakeholder Advisory: The most recent stakeholder advisory issued was null, .
Most Recent Customer Advisory: The most recent customer advisory issued was an null.
Most Recent Entry Point: The most recent entry point used by an initial access broker was an Internal Jira development and ticketing server.
Most Recent Reconnaissance Period: The most recent reconnaissance period for an incident was null.
Most Significant Root Cause: The most significant root cause identified in post-incident analysis was null, Unlawful processing of personal data during mobile phone line changes.
Most Significant Corrective Action: The most significant corrective action taken based on post-incident analysis was null.
.png)
A vulnerability was found in Nothings stb up to 1.26. Impacted is the function stbtt_InitFont_internal in the library stb_truetype.h of the component TTF File Handler. Performing a manipulation results in out-of-bounds read. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
V-SFT versions 6.2.10.0 and prior contain an out-of-bounds read in VS6ComFile!get_macro_mem_COM. Opening a crafted V7 file may lead to information disclosure from the affected product.
V-SFT versions 6.2.10.0 and prior contain a stack-based buffer overflow in VS6ComFile!CSaveData::_conv_AnimationItem. Opening a crafted V7 file may lead to arbitrary code execution on the affected product.
V-SFT versions 6.2.10.0 and prior contain an out-of-bounds read vulnerability in VS6MemInIF!set_temp_type_default. Opening a crafted V7 file may lead to information disclosure from the affected product.
V-SFT versions 6.2.10.0 and prior contain an out-of-bounds read vulnerability in VS6ComFile!load_link_inf. Opening a crafted V7 file may lead to information disclosure from the affected product.

Get company history
Every week, Rankiteo analyzes billions of signals to give organizations a sharper, faster view of emerging risks. With deeper, more actionable intelligence at their fingertips, security teams can outpace threat actors, respond instantly to Zero-Day attacks, and dramatically shrink their risk exposure window.
Identify exposed access points, detect misconfigured SSL certificates, and uncover vulnerabilities across the network infrastructure.
Gain visibility into the software components used within an organization to detect vulnerabilities, manage risk, and ensure supply chain security.
Monitor and manage all IT assets and their configurations to ensure accurate, real-time visibility across the company's technology environment.
Leverage real-time insights on active threats, malware campaigns, and emerging vulnerabilities to proactively defend against evolving cyberattacks.