CVE-2026-82819 Cerberus CVE debrief

Who should care

Defenders responsible for Cerberus FTP Server installations, especially those using versions prior to 2026.3.0, should assess exposure and prioritize verification and remediation. This includes reviewing server configurations, monitoring for potential authentication coercion attempts, and applying vendor patches or updates to affected systems.

Why it matters

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those using Cerberus FTP Server versions prior to 2026.3.0, as it could lead to potential authentication coercion and leakage of sensitive information.

• Potential leakage of the Cerberus service account's Net-NTLMv2 hash
• Authentication coercion against the underlying server

Technical summary

The vulnerability in Cerberus FTP Server allows an authenticated remote attacker to perform UNC path injection via a manipulated parameter, potentially leading to the leakage of the Cerberus service account's Net-NTLMv2 hash. This issue has been resolved in Cerberus FTP Server: 2026.3.0. The vulnerability could lead to potential authentication coercion and leakage of sensitive information. Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those using Cerberus FTP Server versions prior to 2026.3.0.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those using Cerberus FTP Server versions prior to 2026.3.0.

Recommended defensive actions

• Verify the version of Cerberus FTP Server in use and assess exposure
• Review and update the server configuration to prevent UNC path injection
• Monitor for potential authentication coercion attempts
• Apply vendor patches or updates to affected systems
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and source item provide details on the vulnerability, its impact, and the affected versions of Cerberus FTP Server. However, there is limited information on potential exploits or attacks.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.