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CVE-2026-2329

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

9.3
CVSS 9.3 out of 10, critical severity.
41.7%
EPSS 41.7% chance of exploitation in the next 30 days.

The facts

Published
18 February 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
Critical, CVSS 9.3 out of 10 (version 4.0)
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R…
Weakness
Affects
  • grandstream gxp1610 firmware
  • grandstream gxp1615 firmware
  • grandstream gxp1620 firmware
  • grandstream gxp1625 firmware
  • grandstream gxp1628 firmware
Known exploited
Not in the CISA Known Exploited Vulnerabilities catalogue in this build.
EPSS
41.7% chance of exploitation activity in the next 30 days (percentile 99).

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References