CVE-2026-2329

critical

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.

References

https://psirt.grandstream.com/

https://github.com/rapid7/metasploit-framework/pull/20983

https://www.securityweek.com/critical-grandstream-phone-vulnerability-exposes-calls-to-interception/

https://www.helpnetsecurity.com/2026/02/19/grandstream-voip-phones-vulnerability-cve-2026-2329/

https://www.bleepingcomputer.com/news/security/flaw-in-grandstream-voip-phones-allows-stealthy-eavesdropping/

https://www.darkreading.com/threat-intelligence/grandstream-bug-voip-security-blind-spot

https://thehackernews.com/2026/02/grandstream-gxp1600-voip-phones-exposed.html

https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf

Details

Source: Mitre, NVD

Published: 2026-02-18

Updated: 2026-02-20

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 9.3

Vector: 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

Severity: Critical

EPSS

EPSS: 0.34822