CVE-2026-2329

Name: CVE-2026-2329
Creator: NVD / NIST
Published: 2026-02-18T15:18:44.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 40.01%

Last modified Jun 17, 2026

CVE-2026-2329 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. EPSS estimates a 40.01% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

9.3/10

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:X/V:X/RE:X/U:X

EPSS Probability

40.01%

98.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-121

Affected Software

Vendor	Product	Versions
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

References

https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdfProduct, Release Notes
https://github.com/rapid7/metasploit-framework/pull/20983Patch, VDB Entry
https://psirt.grandstream.com/Vendor Advisory
https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixedThird Party Advisory, VDB Entry

Timeline

Published: Feb 18, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2329?

How severe is CVE-2026-2329?

CVE-2026-2329 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 40.01% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2329?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2329?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST