CISCO Security Advisory
Published Date: Not specified
CVE: CVE-2026-76431
Advisory Summary
🔷 Cisco Identity Services Engine (ISE) Multiple Path Traversal Vulnerabilities
Cisco has disclosed multiple vulnerabilities affecting Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) that could allow a remote attacker to perform path traversal on an affected device.
- Remote exploitability: An attacker could potentially reach the vulnerable logic remotely (depending on exposure and access paths).
- Path traversal impact: Such flaws can enable access to unintended files or resources, increasing the likelihood of follow-on compromise (e.g., data exposure, manipulation, or further escalation) depending on the impacted code paths and runtime permissions.
- No workarounds: Cisco states there are no mitigations/workarounds that address the vulnerabilities—patching is the primary control.
- CVE-2026-76431
- CVE-2026-76432
- CVE-2026-76433
- CVE-2026-76434
🛠️ What to do now (actionable guidance)
1. Identify exposure: Inventory all deployed Cisco ISE and ISE-PIC instances (including versions and interfaces/brokers involved).
2. Apply Cisco updates: Upgrade to the fixed software releases referenced in the advisory as soon as operationally feasible.
3. Validate controls: Confirm management plane access is restricted (ACLs, segmentation, firewalling, and MFA where applicable) and review whether any components are internet-reachable or excessively exposed internally.
4. Monitor for indicators: Increase scrutiny of ISE/I/O error logs, unusual request patterns, and any signs consistent with file path probing or abnormal traversal attempts.
- Severity/Rating: Medium (per Cisco advisory)
📌
Reference: Vendor Advisory