#VU121070 Out-of-bounds read in Snort - CVE-2026-20027

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Main Vulnerability Database Vulnerabilities #VU121070

#VU121070 Out-of-bounds read in Snort - CVE-2026-20027

Published: January 7, 2026 / Updated: January 29, 2026


Vulnerability identifier: #VU121070
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-20027
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Snort
Software vendor:
Sourcefire

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when handling DCE/RPC requests. A remote attacker can send a large number of DCE/RPC requests through an established connection that is inspected by Snort 3 and obtain sensitive information in the Snort 3 data stream.


Remediation

Install updates from vendor's website.

External links