CVE-2026-76446 Cisco CVE debrief

Who should care

Defenders responsible for Cisco ISE and Cisco ISE-PIC systems should assess exposure and implement compensating controls. This includes verifying file access permissions, monitoring system logs for suspicious file access attempts, and implementing additional security controls to restrict file access. Security teams and vulnerability management teams should also review the vulnerability and implement necessary mitigations.

Why it matters

CVE-2026-76446 is a medium-severity vulnerability in Cisco ISE and Cisco ISE-PIC API that allows an authenticated remote attacker to read specific files

• Verify file access permissions to prevent unauthorized file reading
• Monitor system logs for suspicious file access attempts
• Implement additional security controls to restrict file access

Technical summary

A vulnerability in the API of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read specific files on the underlying operating system. This vulnerability is due to improper restriction of XML external entity references. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to read specific files on the affected system that the underlying process has permission to access. Defenders should prioritize verifying exposure and implementing compensating controls.

Defensive priority

Defenders should prioritize verifying exposure and implementing compensating controls

Recommended defensive actions

• Verify exposure by checking system configurations and permissions
• Implement compensating controls to restrict file access
• Monitor system logs for suspicious activity
• Review vendor guidance for patching or mitigation
• Conduct an asset inventory to identify potentially affected systems
• Track exceptions and retest remediated assets
• Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

Evidence from official sources indicates a vulnerability in Cisco ISE and Cisco ISE-PIC API, allowing an authenticated remote attacker to read specific files. The official CVE Program record and NIST NVD vulnerability detail provide source-provided CVE metadata and vulnerability assessment. However, the exact scope of affected systems and potential impact is limited by the information available. Defenders should verify exposure and implement compensating controls.

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.