NTT
Company Details
Linkedin ID:
nippon-telegraph-and-telephone
Employees number:
125
Number of followers:
1,774
NAICS:
517
Industry Type:
Homepage:
wikipedia.org
IP Addresses:
0
Company ID:
NIP_2528058
Scan Status:
In-progress
Nippon Telegraph and Telephone Company CyberSecurity Posture
wikipedia.org
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.
Nippon Telegraph and Telephone A.I CyberSecurity Scoring
NTT Risk Score (AI oriented)Between 800 and 849
NTT
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NTT Global Score (TPRM)XXXX
NTT
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NTT Company CyberSecurity News & History
Past Incidents
1
Attack Types
1
Nippon Telegraph and Telephone
Breach
Rankiteo Explanation
Attack with significant impact with customers data leaks
Description: Nippon Telegraph & Telephone (NTT), the 64th biggest company in the world, according to the Fortune 500 list, disclosed a security breach. Hackers gained access to its internal network and stole information on 621 customers from its communications subsidiary, NTT Communications, the largest telecommunications company in Japan, and one of the biggest worldwide. The hack took place on May 7, and became of the intrusion four days later, on May 11. The hackers breached several layers of its IT infrastructure and reached an internal Active Directory to steal data and then upload it to a remote server.
NTT Company Scoring based on AI Models
Cyber Incidents Likelihood 3 - 6 - 9 months
A.I Risk Score Likelihood 3 - 6 - 9 months
Underwriter Stats for NTT
Incidents vs Telecommunications Industry Average (This Year)
No incidents recorded for Nippon Telegraph and Telephone in 2025.
Incidents vs All-Companies Average (This Year)
No incidents recorded for Nippon Telegraph and Telephone in 2025.
Incident Types NTT vs Telecommunications Industry Avg (This Year)
No incidents recorded for Nippon Telegraph and Telephone in 2025.
Incident History — NTT (X = Date, Y = Severity)
NTT cyber incidents detection timeline including parent company and subsidiaries
NTT Company Subsidiaries
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.
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NTT CyberSecurity News
November 12, 2025 04:30 PM
China’s Cyber Silence Is More Worrying Than Russia’s Noise, Chief Cybersecurity Strategist Says
NTT's Mihoko Matsubara explains China's surprise cyber-strategy, Japan's solitary hackers, and the rebellious future of AGI.
October 11, 2025 07:00 AM
Top 10 Data Center Providers in India to Watch in 2025
India is one of the fastest-growing data center market globally. Demand for data center capacity for India is growing at a fast pace and is...
June 19, 2025 07:00 AM
Cyberattacks, cut cables omens of conflict: strategist
A Japanese cybersecurity strategist at a security conference in Rome voiced concern that China's cyberattacks and its cutting of undersea communications cables...
June 18, 2025 07:00 AM
China cyberattacks may be precursor to Taiwan Strait conflict: Expert
A Japanese cybersecurity strategist has voiced concern at a security conference in Rome that China's cyberattacks and its cutting of...
June 18, 2025 07:00 AM
Japanese cybersecurity expert warns of Chinas cyber tactics, undersea cable cuts as signs of looming Taiwan conflict
Mihoko Matsubara, the chief cybersecurity strategist at Nippon Telegraph and Telephone in Japan, stated during a panel at a NATO Defence...
May 27, 2025 07:00 AM
The Top 25 Solution Provider Companies Of The CRN 2025 Solution Provider 500
CRN's 2025 Solution Provider 500 list ranks the top VARs, systems integrators, strategic service providers and IT consultants with operations in North America...
May 08, 2025 07:00 AM
Japan's KDDI and NEC to partner on supply chain, infrastructure cybersecurity
TOKYO -- Japanese telecom company KDDI and IT group NEC plan to start a joint cybersecurity business as soon as this year, Nikkei has...
May 04, 2025 07:00 AM
Japan to cooperate with Singapore on undersea cables, cybersecurity
TOKYO -- Japan plans to step up cooperation with Singapore in such fields as undersea cables and cybersecurity, Nikkei has learned,...
March 11, 2025 10:17 AM
18,000 companies affected as NTT stung by data breach
This week, Japanese telco NTT has revealed it has been the subject to a major data breach, potentially compromising the data of almost 18000 corporate...
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
NTT CyberSecurity History Information
Official Website of Nippon Telegraph and Telephone
The official website of Nippon Telegraph and Telephone is https://en.wikipedia.org/wiki/Nippon_Telegraph_and_Telephone.
Nippon Telegraph and Telephone’s AI-Generated Cybersecurity Score
According to Rankiteo, Nippon Telegraph and Telephone’s AI-generated cybersecurity score is 809, reflecting their Good security posture.
How many security badges does Nippon Telegraph and Telephone’ have ?
According to Rankiteo, Nippon Telegraph and Telephone currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
Does Nippon Telegraph and Telephone have SOC 2 Type 1 certification ?
According to Rankiteo, Nippon Telegraph and Telephone is not certified under SOC 2 Type 1.
Does Nippon Telegraph and Telephone have SOC 2 Type 2 certification ?
According to Rankiteo, Nippon Telegraph and Telephone does not hold a SOC 2 Type 2 certification.
Does Nippon Telegraph and Telephone comply with GDPR ?
According to Rankiteo, Nippon Telegraph and Telephone is not listed as GDPR compliant.
Does Nippon Telegraph and Telephone have PCI DSS certification ?
According to Rankiteo, Nippon Telegraph and Telephone does not currently maintain PCI DSS compliance.
Does Nippon Telegraph and Telephone comply with HIPAA ?
According to Rankiteo, Nippon Telegraph and Telephone is not compliant with HIPAA regulations.
Does Nippon Telegraph and Telephone have ISO 27001 certification ?
According to Rankiteo,Nippon Telegraph and Telephone is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Industry Classification of Nippon Telegraph and Telephone
Nippon Telegraph and Telephone operates primarily in the Telecommunications industry.
Number of Employees at Nippon Telegraph and Telephone
Nippon Telegraph and Telephone employs approximately 125 people worldwide.
Subsidiaries Owned by Nippon Telegraph and Telephone
Nippon Telegraph and Telephone presently has no subsidiaries across any sectors.
Nippon Telegraph and Telephone’s LinkedIn Followers
Nippon Telegraph and Telephone’s official LinkedIn profile has approximately 1,774 followers.
NAICS Classification of Nippon Telegraph and Telephone
Nippon Telegraph and Telephone is classified under the NAICS code 517, which corresponds to Telecommunications.
Nippon Telegraph and Telephone’s Presence on Crunchbase
No, Nippon Telegraph and Telephone does not have a profile on Crunchbase.
Nippon Telegraph and Telephone’s Presence on LinkedIn
Yes, Nippon Telegraph and Telephone maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/nippon-telegraph-and-telephone.
Cybersecurity Incidents Involving Nippon Telegraph and Telephone
As of November 27, 2025, Rankiteo reports that Nippon Telegraph and Telephone has experienced 1 cybersecurity incidents.
Number of Peer and Competitor Companies
Nippon Telegraph and Telephone has an estimated 9,535 peer or competitor companies worldwide.
What types of cybersecurity incidents have occurred at Nippon Telegraph and Telephone ?
Incident Types: The types of cybersecurity incidents that have occurred include Breach.
Incident Details
Can you provide details on each incident ?
What are the most common types of attacks the company has faced ?
Common Attack Types: The most common types of attacks the company has faced is Breach.
Impact of the Incidents
What was the impact of each incident ?
Incident : Data Breach NIP1321301222
Data Compromised: Customer information
Systems Affected: Internal NetworkActive Directory
What types of data are most commonly compromised in incidents ?
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Customer Information and .
Which entities were affected by each incident ?
Incident : Data Breach NIP1321301222
Entity Name: NTT Communications
Entity Type: Company
Industry: Telecommunications
Location: Japan
Customers Affected: 621
Data Breach Information
What type of data was compromised in each breach ?
Incident : Data Breach NIP1321301222
Type of Data Compromised: Customer information
Number of Records Exposed: 621
Additional Questions
Incident Details
What was the most recent incident detected ?
Most Recent Incident Detected: The most recent incident detected was on 2023-05-11.
Impact of the Incidents
What was the most significant data compromised in an incident ?
Most Significant Data Compromised: The most significant data compromised in an incident were Customer Information and .
What was the most significant system affected in an incident ?
Most Significant System Affected: The most significant system affected in an incident was Internal NetworkActive Directory.
Data Breach Information
What was the most sensitive data compromised in a breach ?
Most Sensitive Data Compromised: The most sensitive data compromised in a breach was Customer Information.
What was the number of records exposed in the most significant breach ?
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 621.0.
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Latest Global CVEs (Not Company-Specific)
Description
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
Risk Information
cvss4
Base: 7.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/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
References
- https://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516f
- https://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bc
- https://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41e
- https://github.com/angular/angular/releases/tag/19.2.16
- https://github.com/angular/angular/releases/tag/20.3.14
- https://github.com/angular/angular/releases/tag/21.0.1
- https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37
Description
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.
Risk Information
cvss4
Base: 8.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Integer Overflow vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. This issue has been patched in version 1.3.2.
Risk Information
cvss4
Base: 6.3
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.
Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.
Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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