Incident Score: Analysis & Impact (ZENCRU1775283826)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Zendesk's Breach and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Zendesk Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Zendesk breach identified under incident ID ZENCRU1775283826.
The analysis begins with a detailed overview of Zendesk's information like the linkedin page: https://www.linkedin.com/company/zendesk, the number of followers: 649809, the industry type: Software Development and the number of employees: 7843 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 637 and after the incident was 562 with a difference of -75 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on Zendesk and their customers.
Crunchyroll recently reported "Crunchyroll Data Breach Exposes 1.2 Million Email Addresses via Zendesk", a noteworthy cybersecurity incident.
Crunchyroll, the popular anime streaming platform, experienced a data breach last month after attackers compromised its Zendesk support system.
The disruption is felt across the environment, affecting Zendesk support system, and exposing 1.2 million unique email addresses, with nearly 1.2 million records at risk.
Formal response steps have not been shared publicly yet.
Overall, the incident is a reminder of why proactive monitoring and strong governance matter.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Supply Chain Compromise (T1195) with high confidence (90%), with evidence including attackers compromised its Zendesk support system, and vulnerabilities in third-party support systems and Trusted Relationship (T1199) with moderate to high confidence (80%), supported by evidence indicating third-party support systems...exploited as entry points for cyberattacks. Under the Credential Access tactic, the analysis identified Compromise Accounts (T1586) with moderate to high confidence (70%), with evidence including zendesk support system compromise, and 82% of leaked emails linked to LinkedIn profiles. Under the Collection tactic, the analysis identified Data from Cloud Storage (T1530) with moderate to high confidence (80%), supported by evidence indicating 1.2 million unique email addresses exposed via Zendesk. Under the Exfiltration tactic, the analysis identified Transfer Data to Cloud Account (T1537) with moderate to high confidence (70%), supported by evidence indicating data breach...shared with Have I Been Pwned (HIBP) and Exfiltration Over C2 Channel (T1041) with moderate confidence (60%), supported by evidence indicating 1.2 million email addresses exposed. Under the Impact tactic, the analysis identified Data Manipulation: Transmitted Data Manipulation (T1565.002) with moderate confidence (50%), supported by evidence indicating potential secondary targeting by threat actors. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Zendesk Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/zendesk/incident/ZENCRU1775283826
- Zendesk CyberSecurity Rating page: https://www.rankiteo.com/company/zendesk
- Zendesk Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/zencru1775283826-zendesk-crunchyroll-breach-march-2026/
- Zendesk CyberSecurity Score History: https://www.rankiteo.com/company/zendesk/history
- Zendesk CyberSecurity Incident Source: https://www.linkedin.com/feed/update/urn:li:activity:7446057586228998144
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf