Insecure library loading in Asterisk Open Source and Certified Asterisk - CVE-2026-23740
Published: February 6, 2026
Vulnerability identifier: #VU122442
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23740
CWE-ID: CWE-427
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Digium (Linux Support Services)
Affected software:
Asterisk Open Source
Certified Asterisk
Asterisk Open Source
Certified Asterisk
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the application loads dynamic libraries in an insecure manner from the /tmp directory. A local user can place a specially crafted library file into the /tmp directory and execute arbitrary code on the system with root privileges.
How to mitigate CVE-2026-23740
Install updates from vendor's website.