CVE-2026-2329
An unauthenticated stack-based buffer overflow vulnerability exists in the HTTP API endpoint /cgi-bin/api.values.get.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 41.7%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 4.0
- 9.3 CRITICALCVSS: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/M
- EPSS
- 41.72% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-121
- Affected
- grandstream/gxp1610 firmware · grandstream/gxp1615 firmware · grandstream/gxp1620 firmware · grandstream/gxp1625 firmware · grandstream/gxp1628 firmware · grandstream/gxp1630 firmware
- Source
- cve@rapid7.com
EPSS 41.7% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.