Main Vulnerability Database Vulnerabilities #VU122443

Incorrect default permissions in Asterisk Open Source and Certified Asterisk - CVE-2026-23741

Published: February 6, 2026

Vulnerability identifier: #VU122443

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-23741

CWE-ID: CWE-276

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for the "/etc/asterisk/ast_debug_tools.conf" file, which is writable by the asterisk user:group and is used by the "asterisk/contrib/scripts/ast_coredumper". A local user can modify the file and execute arbitrary OS commands as root.

Affected software

Asterisk Open Source
Certified Asterisk

How to mitigate CVE-2026-23741

Install updates from vendor's website.

Asterisk Open Source - addressed in versions 20.18.2, 21.12.1, 22.8.2, 23.2.2
Certified Asterisk - update to 20.7-cert9

External References

https://github.com/asterisk/asterisk/security/advisories/GHSA-rvch-3jmx-3jf3

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