Buffer over-read in Asterisk Open Source and Certified Asterisk - CVE-2026-57185
Published: June 26, 2026
Vulnerability identifier: #VU135548
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-57185
CWE-ID: CWE-126
Exploitation vector: Remote 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 remote user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the PJSIP MWI body parser when handling a crafted SIP NOTIFY request. A remote user can send a specially crafted SIP NOTIFY request to cause a denial of service.
The attacker must be able to pass SIP authentication either by username and password or by source IP address matching.
How to mitigate CVE-2026-57185
Install security update from vendor's website.