CISCO Security Advisory
Published Date: Not specified
CVE: CVE-2026-20305
Advisory Summary
🚨 ⬛ Cisco Identity Services Engine (ISE) Command Injection (Critical) — Patch Now
Cisco reports multiple Critical vulnerabilities in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) that enable an authenticated, remote attacker to perform command injection and execute arbitrary commands as the root user.
- Remote code execution via command injection
- Full compromise potential due to execution as root
- Attack requires valid administrative credentials, raising urgency for environments where admin creds might be exposed/compromised
- Any network segments where ISE/ISE-PIC are reachable by users, admins, service accounts, or automation that could be abused
- Organizations with higher admin credential exposure risk (shared admin accounts, weak MFA coverage for admin access, or over-permissioned service accounts)
- ✅ Cisco has released software updates that address these vulnerabilities
- 🚫 No workarounds are provided—upgrading is the primary and recommended action
- CVE-2026-20305
- CVE-2026-20306
📌 Actionable steps for market/ops teams
1. Validate affected versions of ISE and ISE-PIC against Cisco guidance and your deployment inventory.
2. Plan an emergency maintenance window to apply the released updates (given Critical + root execution).
3. Harden admin access paths immediately while patching: enforce MFA, restrict admin interfaces by source IP/VPN, and reduce credential reuse.
4. Audit administrative logins and changes around the ISE management plane (look for anomalous admin sessions).
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-2026-20305 -2026-20306
Reference: Vendor Advisory