CVE-2026-2329CRITICAL 9.8EPSS p98.5%

CVE-2026-2329CVE-2026-2329

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS40.01% probability of exploitation · percentile 98.5% · 2026-06-19T12:03:05Z
Published2026-02-18
Last modified2026-02-20

Underlying weaknesses· 1

CWE-121

References

  1. https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf
  2. https://github.com/rapid7/metasploit-framework/pull/20983
  3. https://psirt.grandstream.com/
  4. https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixed

1

TypeTargetConfidenceTier
WeaknessStack-based Buffer Overflowcwe-1210%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.