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Comparison Overview

T-MobileT-Mobile
VS
TelefónicaTelefónica
T-Mobile

T-Mobile

12920 SE 38th St, Bellevue, WA, US, 98006

Last Update: 03/07/2026

View Profile
Between 0 and 549
https://t-mobile.com
454/1000Critical

As the supercharged Un-carrier, T-Mobile US, Inc. (NASDAQ: TMUS) is powered by an award-winning 5G network that connects more people, in more places, than ever before. With T-Mobile’s unique value proposition of best network, best value, and best experiences, the Un-car...

NAICS:517
NAICS Definition:Telecommunications
Employees:95,676
Subsidiaries:9
12-month incidents
3
Known data breaches
20
Attack type number
4
Telefónica

Telefónica

Spain, Madrid, 28050, ES

Last Update: 12/05/2026

View Profile
Between 550 and 599
http://www.telefonica.com
582/1000Very Poor

Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers. We have the best infrastructure, as well as an innovative range of digital and data services; therefore, we are favorably position...

NAICS:517
NAICS Definition:Telecommunications
Employees:119,880
Subsidiaries:27
12-month incidents
0
Known data breaches
2
Attack type number
2

Compliance Ranges Comparison

Based On Specific Ai Models Category
T-Mobile

T-Mobile

-
ISO 27001Not verified
ISO 27001
-
SOC2 Type 1Not verified
SOC2 Type 1
-
SOC2 Type 2Not verified
SOC2 Type 2
-
GDPRNot verified
GDPR
-
PCI DSSNot verified
PCI DSS
-
HIPAANot verified
HIPAA
Telefónica

Telefónica

-
ISO 27001Not verified
ISO 27001
-
SOC2 Type 1Not verified
SOC2 Type 1
-
SOC2 Type 2Not verified
SOC2 Type 2
-
GDPRNot verified
GDPR
-
PCI DSSNot verified
PCI DSS
-
HIPAANot verified
HIPAA

Benchmark & Cyber Underwriting Signals

Incidents vs Telecommunications Industry Avg (This Year)

T-Mobile has 61.29% more incidents than the average of same-industry companies with at least one recorded incident.

Incidents

Incidents vs Telecommunications Industry Avg (This Year)

No incidents recorded for Telefónica in 2026.

Incidents

Incident History - T-Mobile (X = Date, Y = Severity)

T-Mobile cyber incidents detection timeline including parent company and subsidiaries.

R - Ransomware
C - Cyber Attack
D - Data Breach
V - Vulnerability

Incident History - Telefónica (X = Date, Y = Severity)

Telefónica cyber incidents detection timeline including parent company and subsidiaries.

R - Ransomware
C - Cyber Attack
D - Data Breach
V - Vulnerability

Notable Incidents

Last Cyber / HR Incidents / Global...
T-Mobile

T-Mobile

Incidents
🔒 Incident : Breach
T-M1775514990
🔒 Incident : Breach
T-M1774995874
🔒 Incident : Breach
T-M1775061177
Telefónica

Telefónica

Incidents
🔒 Incident : Breach
TEL1766404766
🔒 Incident : Breach
MOVTEL1767881948
🔒 Incident : Ransomware
TEL732070725

FAQ

Between T-Mobile company and Telefónica company, which one has the best AI Cybersecurity Score ?
Between T-Mobile company and Telefónica company, which one has experienced more cyber incidents in the past ?
Between T-Mobile company and Telefónica company, which one has experienced more cyber incidents this year ?
Between T-Mobile company and Telefónica company, which one has experienced at least one ransomware attack ?
Between T-Mobile company and Telefónica company, which one has experienced at least one data breach ?
Between T-Mobile company and Telefónica company, which one has experienced at least one targeted cyberattack ?
Between T-Mobile company and Telefónica company, which one has experienced at least one vulnerability ?
Between T-Mobile company and Telefónica company, which one holds the most compliance certifications ?
Between T-Mobile company and Telefónica company, which one holds the fewest compliance certifications ?
Between T-Mobile company and Telefónica company, which one has the most subsidiaries ?
Between T-Mobile company and Telefónica company, which one has the largest number of employees ?
Between T-Mobile and Telefónica, which company holds both SOC 2 Type 1 certifications ?
Between T-Mobile and Telefónica, which company holds both SOC 2 Type 2 certifications ?
Which company is ISO 27001 certified - T-Mobile or Telefónica ?
Which company is PCI DSS compliant - T-Mobile or Telefónica ?
Between T-Mobile and Telefónica, which company complies with HIPAA regulations for healthcare data ?
Between T-Mobile and Telefónica, which company complies with GDPR requirements ?

Latest Global CVEs

CVE-2026-5270
SUMMARY

An authentication bypass vulnerability exists in certain releases of Ciena Navigator Network Control Suite (NCS), Manage Control Plan (MCP), and Blue Planet products. The issue is caused by improper handling of HTTP request paths and headers, which allows an unauthenticated attacker to manipulate requests in a manner that bypasses authentication and associated audit logging controls.

PUBLISHED
Date2026-07-14
UPDATED
Date2026-07-14
IMPACT SCORE
NA
EXPLOITABILITY
NA
CVE-2026-5269
SUMMARY

In Ciena's Navigator Network Control Suite (NCS) and Manage Control Plan (MCP), there are hidden system accounts used for internal software operations. Some of these accounts have default passwords that may be predictable. While these accounts have very limited permissions on their own, an attacker could combine an attack using one of these accounts with other potential weaknesses to launch a more significant attack, possibly leading to escalation of privilege on the system.

PUBLISHED
Date2026-07-14
UPDATED
Date2026-07-14
IMPACT SCORE
NA
EXPLOITABILITY
NA
CVE-2026-51808
SUMMARY

Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the openhtj2k_decoder_impl::invoke, invoke_line_based, invoke_line_based_stream, and invoke_line_based_predecoded function in source/core/interface/decoder.cpp

PUBLISHED
Date2026-07-14
UPDATED
Date2026-07-14
IMPACT SCORE
NA
EXPLOITABILITY
NA
CVE-2026-51807
SUMMARY

Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp

PUBLISHED
Date2026-07-14
UPDATED
Date2026-07-14
IMPACT SCORE
NA
EXPLOITABILITY
NA
CVE-2026-36035
SUMMARY

Incorrect access control in the /api/License/deactivateOffline endpoint of CAXPerts UniversalPlantViewer WebServices Server v2.7.6 allows authenticated attackers with low-level privileges to cause a Denial of Service (DoS) via removing the license from the webserver.

PUBLISHED
Date2026-07-14
UPDATED
Date2026-07-14
IMPACT SCORE
NA
EXPLOITABILITY
NA