Untrusted search path in Asterisk Open Source and Certified Asterisk - CVE-2026-57203
Published: June 26, 2026
Vulnerability identifier: #VU135532
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57203
CWE-ID: CWE-426
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.
The vulnerability exists due to untrusted search path in the ast_loggrabber script when executing a python script from the /tmp directory. A local user can place a malicious script in /tmp to escalate privileges.
Exploitation requires prior shell access on the Asterisk server and an administrator to run the ast_loggrabber script with elevated privileges.
How to mitigate CVE-2026-57203
Install security update from vendor's website.