CVE-2026-76524
Open Source Snort 3 Control Channel Socket Arbitrary Command Execution Vulnerability
CVE-2026-76524: Open Source Snort 3 Control Channel Socket Arbitrary Command Execution Vulnerability. Not in the CISA KEV catalog.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-76524 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- CVSS base score
- 7.8 (Cisco)
- Fixed releases
- Cisco: 3.12.4.0
- Vendor advisories
- 2 from Cisco
- VulniPulse record
- Published · Updated
Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-76524; bulletin-wide values are not repeated here.
Is CVE-2026-76524 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-76524 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-76524?
Upgrade to a fixed release named by the vendor:
- Cisco: 3.12.4.0
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory. (Cisco)
- Release 3.x: upgrade to 3.12.4.0. (Cisco)
Vendor advisory comparison
Cisco
2 advisories- Advisory severityHigh7.8
High [CVE-2026-76524] Open Source Snort 3 Control Channel Socket Arbitrary Command Execution Vulnerability
cisco-sa-opensrc-snort3-2fXGJPfeSource published Source updated
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…
- Affected products in this advisory
- Open Source Snort3
- Source-reported affected versions
- Scope: This vulnerability affects Open Source Snort 3, regardless of device configuration.
- Release 3.x (first fixed: 3.12.4.0)
- Source-reported fixed versions
- 3.12.4.0
- Mitigation guidance
- 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.
- Workarounds
- There are no workarounds that address this vulnerability.
- Advisory severityUnrated
Advisory [CVE-2026-20011 +12] Cisco Advance Notification for Publication of October 21, 2026, Security Advisories
cisco-sa-notice-QGwHnJ6kSource published Source updated
This bulletin covers 13 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
On October 21, 2026, the Cisco Product Security Incident Response Team (PSIRT) published the following advisories. To remediate the vulnerabilities that were disclosed on October 21, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the Foundation: A Predictable, Customer-Focused Response to AI-Accelerated Vulnerability Discovery. Snort 3 Cisco Security Advisory CVE ID Security Impact Rating CVSS Base Score Critical 9.0 High 7.8 Medium 5.8 5.3 Cisco Expressway and Unified Communications Products
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To remediate the vulnerabilities that were disclosed on October 21, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories.
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