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Advisory severityHigh7.8Cisco Updated

High [CVE-2026-76524] Open Source Snort 3 Control Channel Socket Arbitrary Command Execution Vulnerability

This high-severity Cisco advisory covers CVE-2026-76524 affecting Open Source Snort3.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

cisco-sa-opensrc-snort3-2fXGJPfe Source published Source updated

VulniPulse record published Record updated

CVE-2026-76524
Affected products & platforms
CiscoUnclassified
Open source advisory

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Summary

A vulnerability in the control channel socket implementation of Open Source Snort 3 could allow an authenticated, local attacker with low privileges to execute arbitrary commands as the Snort 3 process user.

This vulnerability is due to a lack of authentication when a local user connects to the Snort control channel socket. A successful exploit could allow the attacker to execute arbitrary commands as well as read and write Snort 3 process memory.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 21, 2026, Security Advisories.

In addition, for further documentation of improvements and fixes in Open Source Snort 3, see Multiple Cisco Products Snort 3 Security Hardening Release: October 2026.

Affected product named by the advisory: Open Source Snort3.

Affected versions
  • Scope: This vulnerability affects Open Source Snort 3, regardless of device configuration.
  • Release 3.x (first fixed: 3.12.4.0)

Official advisory · high-confidence parse· fetched 16 hours ago·verify at source

Fixed versions
  • 3.12.4.0

Official advisory · high-confidence parse· fetched 16 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
  • Release 3.x: upgrade to 3.12.4.0.
Workaround status
  • There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 16 hours ago·verify at source

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