CVE-2026-2329
Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow
- State
- Published
- Severity
- 9.3 Critical
- Published
- Feb 18, 2026
- Updated
- Feb 18, 2026
- Reserved
- Feb 11, 2026
Description
An unauthenticated stack-based buffer overflow vulnerability exists in the HTTP API endpoint /cgi-bin/api.values.get. A remote attacker can leverage this vulnerability to achieve unauthenticated remote code execution (RCE) with root privileges on a target device. The vulnerability affects all six device models in the series: GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | rapid7 |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
GXP1610Grandstream |
|
GXP1615Grandstream |
|
GXP1620Grandstream |
|
GXP1625Grandstream |
|
GXP1628Grandstream |
|
GXP1630Grandstream |
|
References
- https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixedthird-party-advisory
- https://psirt.grandstream.com/vendor-advisory
- https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdfrelease-notes
- https://github.com/rapid7/metasploit-framework/pull/20983exploit
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