CVE-2026-2329

CRITICAL

Grandstream GXP16xx - Buffer Overflow

Title source: llm

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.

Exploits (1)

metasploit WORKING POC GREAT

by sfewer-r7 · rubypoc

https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/grandstream_gxp1600_unauth_rce.rb

View Code ZIP pw:eip

References (4)

[Various Sources] https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf

[Various Sources] https://psirt.grandstream.com/

[Issue Tracking] https://github.com/rapid7/metasploit-framework/pull/20983

[Third Party Advisory] https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixed

Scores

CVSS v3 9.8

EPSS 0.3174

EPSS Percentile 96.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-121

Status published

Products (6)

grandstream/gxp1610_firmware < 1.0.7.81

grandstream/gxp1615_firmware < 1.0.7.81

grandstream/gxp1620_firmware < 1.0.7.81

grandstream/gxp1625_firmware < 1.0.7.81

grandstream/gxp1628_firmware < 1.0.7.81

grandstream/gxp1630_firmware < 1.0.7.81

Published Feb 18, 2026

Tracked Since Feb 18, 2026