Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. Prior to commit 628b716, a stack buffer overflow exists in the PJLIB-UTIL telnet CLI front-end when redrawing the command line during history recall (handle_up_down() in cli_telnet.c). This affects only applications that enable the telnet CLI front-end (same gating as the related CLI issue). The line-redraw sequence for a recalled history entry can accumulate more data than a fixed-size stack buffer holds, which may lead to application termination. Exploitation requires access to the unauthenticated telnet CLI, which already permits arbitrary CLI commands, so the additional impact is limited. Applications that do not enable the telnet CLI front-end are not affected. This issue has been patched via commit 628b716.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Teluu | Pjsip | <= 2.17 |
Related Weaknesses (CWE)
References
- https://github.com/pjsip/pjproject/commit/628b71638465bacf66e767959e6acbab822eccPatch
- https://github.com/pjsip/pjproject/security/advisories/GHSA-rpq9-9fx7-95xwPatchVendor Advisory
FAQ
What is CVE-2026-57165?
CVE-2026-57165 is a vulnerability with a CVSS score of 5.3 (MEDIUM). PJSIP is a free and open source multimedia communication library written in C. Prior to commit 628b716, a stack buffer overflow exists in the PJLIB-UTIL telnet CLI front-end when redrawing the command...
How severe is CVE-2026-57165?
CVE-2026-57165 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57165?
Check the references section above for vendor advisories and patch information. Affected products include: Teluu Pjsip.