Stack-based buffer overflow in pjsip - CVE-2026-57165
Published: August 3, 2026
Vulnerability identifier: #VU140814
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57165
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to stack-based buffer overflow in the PJLIB-UTIL telnet CLI front-end history handling in handle_up_down() in cli_telnet.c when redrawing the command line during history recall. A remote attacker can access the unauthenticated telnet CLI and trigger history recall to cause a denial of service.
Only applications that enable the telnet CLI front-end are vulnerable.
Affected software
pjsip
How to mitigate CVE-2026-57165
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.