Comparison Overview

Nippon Telegraph and Telephone

VS

AT&T

Nippon Telegraph and Telephone

East Tower, 5-1, Otemachi 1-Chome, Chiyoda-ku, Tokyo, None, Tokyo, Tokyo, JP, 100-8116
Last Update: 2025-12-11

Nippon Telegraph and Telephone The Japan Telegraph and Telephone Corporation is a Japanese telecommunications company headquartered in Tokyo, Japan. Wikipedia Stock price: 9432 (TYO) JP¥ 5,170 -137.00 (-2.58%) Revenue: 11.39 lakh crores JPY (2017) CEO: Hiroo Unoura (Jun 2012–) Headquarters: Chiyoda, Tokyo, Japan Number of employees: 2,74,844 (2016) Nippon Telegraph & Tel is the fourth-largest telephone operating company by total revenue ($94.2 B USD). The Japan Telegraph and Telephone Corporation (日本電信電話株式会社 Nippon Denshin Denwa Kabushiki-gaisha), is a Japanese telecommunications company headquartered in Tokyo, Japan. Ranked 65th in Fortune Global 500, Nippon Telegraph and Telephone is the fourth largest telecommunications company in the world in terms of revenue. The company is incorporated pursuant to the Nippon Telegraph and Telephone Law (Law Concerning Japan Telegraph and Telephone Corporation, Etc.).[3] The purpose of the company defined by the Law is to own all the shares issued by Japan Telegraph and Telephone East Corporation (Nippon Telegraph and Telephone East) and Japan Telegraph and Telephone West Corporation (Nippon Telegraph and Telephone West) and to ensure proper and stable provision of telecommunications services all over Japan including remote rural areas by these companies as well as to conduct research relating to the telecommunications technologies that will form the foundation for telecommunications. While Nippon Telegraph and Telephone is listed on Tokyo, Osaka, New York, and London stock exchanges, the Japanese government still owns roughly one-third of Nippon Telegraph and Telephone's shares, regulated by the Nippon Telegraph and Telephone Law.

NAICS: 517
NAICS Definition: Telecommunications
Employees: 125
Subsidiaries: 0
12-month incidents
0
Known data breaches
1
Attack type number
1

AT&T

208 S. Akard Street, None, Dallas, TX, US, 75202
Last Update: 2025-12-11
Between 0 and 549

We understand that our customers want an easier, less complicated life. We’re using our network, labs, products, services, and people to create a world where everything works together seamlessly, and life is better as a result. How will we continue to drive for this excellence in innovation? With you. Our people, and their passion to succeed, are at the heart of what we do. Today, we’re poised to connect millions of people with their world, delivering the human benefits of technology in ways that defy the imaginable. What are you dreaming of doing with your career? Find stories about our talent, career advice, opportunities, company news, and innovations here on LinkedIn. To learn more about joining AT&T, visit: http://www.att.jobs We provide in some of our posts links to articles or posts from third-party websites unaffiliated with AT&T. In doing so, AT&T is not adopting, endorsing or otherwise approving the content of those articles or posts. AT&T is providing this content for your information only.

NAICS: 517
NAICS Definition: Telecommunications
Employees: 177,538
Subsidiaries: 7
12-month incidents
4
Known data breaches
19
Attack type number
3

Compliance Badges Comparison

Security & Compliance Standards Overview

https://images.rankiteo.com/companyimages/nippon-telegraph-and-telephone.jpeg
Nippon Telegraph and Telephone
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
https://images.rankiteo.com/companyimages/att.jpeg
AT&T
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
Compliance Summary
Nippon Telegraph and Telephone
100%
Compliance Rate
0/4 Standards Verified
AT&T
0%
Compliance Rate
0/4 Standards Verified

Benchmark & Cyber Underwriting Signals

Incidents vs Telecommunications Industry Average (This Year)

No incidents recorded for Nippon Telegraph and Telephone in 2025.

Incidents vs Telecommunications Industry Average (This Year)

AT&T has 426.32% more incidents than the average of same-industry companies with at least one recorded incident.

Incident History — Nippon Telegraph and Telephone (X = Date, Y = Severity)

Nippon Telegraph and Telephone cyber incidents detection timeline including parent company and subsidiaries

Incident History — AT&T (X = Date, Y = Severity)

AT&T cyber incidents detection timeline including parent company and subsidiaries

Notable Incidents

Last 3 Security & Risk Events by Company

https://images.rankiteo.com/companyimages/nippon-telegraph-and-telephone.jpeg
Nippon Telegraph and Telephone
Incidents

Date Detected: 05/2020
Type:Breach
Attack Vector: Internal Network Access
Motivation: Data Theft
Blog: Blog
https://images.rankiteo.com/companyimages/att.jpeg
AT&T
Incidents

Date Detected: 12/2025
Type:Breach
Blog: Blog

Date Detected: 11/2025
Type:Breach
Motivation: Financial Gain, Data Theft
Blog: Blog

Date Detected: 5/2025
Type:Breach
Blog: Blog

FAQ

Nippon Telegraph and Telephone company demonstrates a stronger AI Cybersecurity Score compared to AT&T company, reflecting its advanced cybersecurity posture governance and monitoring frameworks.

AT&T company has faced a higher number of disclosed cyber incidents historically compared to Nippon Telegraph and Telephone company.

In the current year, AT&T company has reported more cyber incidents than Nippon Telegraph and Telephone company.

AT&T company has confirmed experiencing a ransomware attack, while Nippon Telegraph and Telephone company has not reported such incidents publicly.

Both AT&T company and Nippon Telegraph and Telephone company have disclosed experiencing at least one data breach.

AT&T company has reported targeted cyberattacks, while Nippon Telegraph and Telephone company has not reported such incidents publicly.

Neither Nippon Telegraph and Telephone company nor AT&T company has reported experiencing or disclosing vulnerabilities publicly.

Neither Nippon Telegraph and Telephone nor AT&T holds any compliance certifications.

Neither company holds any compliance certifications.

AT&T company has more subsidiaries worldwide compared to Nippon Telegraph and Telephone company.

AT&T company employs more people globally than Nippon Telegraph and Telephone company, reflecting its scale as a Telecommunications.

Neither Nippon Telegraph and Telephone nor AT&T holds SOC 2 Type 1 certification.

Neither Nippon Telegraph and Telephone nor AT&T holds SOC 2 Type 2 certification.

Neither Nippon Telegraph and Telephone nor AT&T holds ISO 27001 certification.

Neither Nippon Telegraph and Telephone nor AT&T holds PCI DSS certification.

Neither Nippon Telegraph and Telephone nor AT&T holds HIPAA certification.

Neither Nippon Telegraph and Telephone nor AT&T holds GDPR certification.

Latest Global CVEs (Not Company-Specific)

Description

A weakness has been identified in itsourcecode Online Pet Shop Management System 1.0. This vulnerability affects unknown code of the file /pet1/addcnp.php. This manipulation of the argument cnpname causes sql injection. The attack can be initiated remotely. The exploit has been made available to the public and could be exploited.

Risk Information
cvss2
Base: 7.5
Severity: LOW
AV:N/AC:L/Au:N/C:P/I:P/A:P
cvss3
Base: 7.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cvss4
Base: 6.9
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

A security flaw has been discovered in Tenda AX9 22.03.01.46. This affects the function image_check of the component httpd. The manipulation results in use of weak hash. It is possible to launch the attack remotely. A high complexity level is associated with this attack. It is indicated that the exploitability is difficult. The exploit has been released to the public and may be exploited.

Risk Information
cvss2
Base: 2.6
Severity: HIGH
AV:N/AC:H/Au:N/C:N/I:P/A:N
cvss3
Base: 3.7
Severity: HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
cvss4
Base: 6.3
Severity: HIGH
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

A weakness has been identified in code-projects Student File Management System 1.0. This issue affects some unknown processing of the file /admin/update_student.php. This manipulation of the argument stud_id causes sql injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be exploited.

Risk Information
cvss2
Base: 7.5
Severity: LOW
AV:N/AC:L/Au:N/C:P/I:P/A:P
cvss3
Base: 7.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cvss4
Base: 6.9
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

A security flaw has been discovered in code-projects Student File Management System 1.0. This vulnerability affects unknown code of the file /admin/save_user.php. The manipulation of the argument firstname results in sql injection. The attack can be executed remotely. The exploit has been released to the public and may be exploited.

Risk Information
cvss2
Base: 7.5
Severity: LOW
AV:N/AC:L/Au:N/C:P/I:P/A:P
cvss3
Base: 7.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cvss4
Base: 6.9
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Description

A vulnerability was identified in code-projects Student File Management System 1.0. This affects an unknown part of the file /admin/update_user.php. The manipulation of the argument user_id leads to sql injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Risk Information
cvss2
Base: 7.5
Severity: LOW
AV:N/AC:L/Au:N/C:P/I:P/A:P
cvss3
Base: 7.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
cvss4
Base: 6.9
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X