Open Source Snort 3 Control Channel Socket Aribitrary Command Execution Vulnerability

published 2026-10-21 18 d ago modified 2026-10-22 17 d ago also EUVD-2026-107358

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

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. An attacker could exploit this vulnerability by connecting to the Snort 3 control channel socket as a local user. A successful exploit could allow the attacker to execute arbitrary commands as well as read and write Snort 3 process memory.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 d ago (2026-10-21)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Cisco Cisco Open Source Snort3

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

sec.cloudapps.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-opensrc-snort3-2fXGJPfe

Sources

CVE List CVE-2026-76524
NVD CVE-2026-76524

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Summary