CISCO Security Advisory
Published Date: Not specified
CVE: CVE-2026-76524
Advisory Summary
🛡️ Open Source Snort 3 — Control Channel Socket Command Execution (High Risk)
Overview
An Open Source Snort 3 control channel socket weakness enables an authenticated, local attacker with low privileges to execute arbitrary commands as the Snort 3 process user. The flaw is rooted in a lack of authentication when a local user connects to the Snort 3 control channel socket.
- Arbitrary command execution under the Snort 3 service account
- Read/write access to Snort 3 process memory
- Potential pathway to full host compromise depending on service permissions and local access controls
🚨 Threat Scenario (Practical View)
If an attacker has any authenticated local foothold (e.g., compromised user account, weak local credentials, or misuse of an internal service account), they may be able to:
1) connect to the Snort 3 control channel socket,
2) trigger arbitrary command execution,
3) leverage memory access to further escalate or extract sensitive data.
- ✅ Cisco has released software updates that address the vulnerability.
- ❌ No workarounds are available—patching is the primary (and necessary) remediation.
🔐 Operational Actions for Market Professionals
1) Inventory all deployments running Open Source Snort 3 with control channel socket enabled/used.
2) Prioritize patching immediately on systems exposed to local authenticated users (especially shared servers, SOC workstations, bastion hosts, and monitoring nodes).
3) Validate post-update behavior and confirm the control channel socket no longer accepts unauthorized/local unauthenticated connections.
4) Harden local access: reduce local account exposure, enforce least privilege for Snort service context, and tighten host hardening (PAM/SSO, MFA, local auth restrictions).
- CVE-2026-76524 (Security impact rating: High)
📌
-2026-76524
Reference: Vendor Advisory