CVE-2026-76424 Cisco CVE debrief

Who should care

Cisco ISE administrators, security teams, and IT professionals responsible for Cisco ISE deployments should assess exposure and implement recommended actions. This includes reviewing configurations, monitoring for suspicious activity, and verifying administrative credential security. Additionally, operators and platform managers should be aware of the potential impact on their systems and take steps to mitigate the vulnerability.

Why it matters

CVE-2026-76424 is a high-severity vulnerability in Cisco ISE's REST API that allows authenticated remote attackers to upload or copy arbitrary files. Defenders should prioritize reviewing configurations, monitoring for suspicious activity, and verifying administrative credential security.

• Potential for arbitrary file uploads and command execution as root
• Requires valid administrative credentials for exploitation
• Limited details on affected versions and remediation steps in the corpus

Technical summary

The Cisco ISE REST API vulnerability allows authenticated remote attackers to upload or copy arbitrary files on affected devices due to insufficient validation in file operations. Successful exploitation requires valid administrative credentials and could allow attackers to execute arbitrary commands as root. The vulnerability has a CVSS score of 7.2 and is considered high-severity. Affected product deployments should be reviewed for exposure, and administrators should implement recommended actions to mitigate the vulnerability.

Defensive priority

High priority for Cisco ISE administrators and security teams

Recommended defensive actions

• Review and update Cisco ISE configurations to restrict file operations
• Implement additional monitoring for suspicious file uploads and system changes
• Verify administrative credential security and limit access where possible
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Cisco ISE's REST API, allowing authenticated remote attackers to upload or copy arbitrary files. Cisco's security advisory is referenced but not detailed in the corpus. Evidence is limited, and defenders should verify affected scope and vendor guidance. The vulnerability requires valid administrative credentials for exploitation and has a CVSS score of 7.2.

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.