Incident Score: Analysis & Impact (RAN1770216204)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Rancher's Vulnerability 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 Rancher 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 Rancher breach identified under incident ID RAN1770216204.
The analysis begins with a detailed overview of Rancher's information like the linkedin page: https://www.linkedin.com/company/rancher, the number of followers: 65127, the industry type: Software Development and the number of employees: 201 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 754 and after the incident was 752 with a difference of -2 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 Rancher and their customers.
Rancher (SUSE) recently reported "High-Severity Flaw in Rancher Manager Exposes Admin Credentials via MITM Attacks", a noteworthy cybersecurity incident.
A newly disclosed vulnerability in Rancher Manager, tracked as CVE-2025-67601 (advisory GHSA-mc24-7m59-4q5p), could allow attackers to intercept administrator login credentials during Rancher CLI operations.
The disruption is felt across the environment, affecting Rancher Manager clusters, and exposing Administrator login credentials (basic authentication headers and session tokens).
In response, moved swiftly to contain the threat with measures like Use of `--cacert` flag with a valid CA certificate when using `rancher login`, and began remediation that includes Upgrade to patched versions (v2.13.2, v2.12.6, v2.11.10, v2.10.11).
The case underscores how teams are taking away lessons such as Importance of proper TLS certificate validation and avoiding the use of `--skip-verify` without `--cacert` in Rancher CLI operations, and recommending next steps like Upgrade to the latest patched versions of Rancher Manager (v2.13.2, v2.12.6, v2.11.10, v2.10.11), Always use the `--cacert` flag with a valid CA certificate when logging into Rancher CLI and Assess Rancher CLI connections for traversal of untrusted networks.
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 Exploit Public-Facing Application (T1190) with moderate confidence (60%), supported by evidence indicating high-Severity Flaw in Rancher Manager...could allow attackers to intercept admin credentials and Phishing: Spearphishing Link (T1566.001) with lower confidence (40%), supported by evidence indicating mITM attack vector where a remote attacker could intercept basic authentication headers. Under the Credential Access tactic, the analysis identified Man-in-the-Middle (T1557) with high confidence (90%), supported by evidence indicating man-in-the-Middle (MITM) attack vector...intercept basic authentication headers and session tokens and Unsecured Credentials: Private Keys (T1552.004) with moderate to high confidence (70%), supported by evidence indicating improper TLS certificate validation...CLI fetches CA certificates from Rancher Manager’s internal settings. Under the Defense Evasion tactic, the analysis identified Subvert Trust Controls: Install Root Certificate (T1553.004) with moderate to high confidence (80%), supported by evidence indicating attacker could exploit this by injecting a malicious CA certificate, impersonating a trusted service and Indicator Removal: Clear Windows Event Logs (T1070.001) with lower confidence (30%), supported by evidence indicating no details on monitoring or logging impacts in the incident. Under the Lateral Movement tactic, the analysis identified Use Alternate Authentication Material: Application Access Token (T1550.001) with moderate to high confidence (70%), supported by evidence indicating intercept session tokens during login...compromising the confidentiality and integrity of Rancher clusters. Under the Impact tactic, the analysis identified Network Denial of Service (T1498) with lower confidence (40%), supported by evidence indicating potential compromise of Rancher clusters...unauthorized cluster configuration changes and Account Access Removal (T1531) with moderate confidence (50%), supported by evidence indicating administrator login credentials...could allow attackers to intercept. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Rancher Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/rancher/incident/RAN1770216204
- Rancher CyberSecurity Rating page: https://www.rankiteo.com/company/rancher
- Rancher Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/ran1770216204-rancher-vulnerability-january-2026/
- Rancher CyberSecurity Score History: https://www.rankiteo.com/company/rancher/history
- Rancher CyberSecurity Incident Source: https://cyberpress.org/rancher-manager-security-bug/
- 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