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Vulnerability · Published Feb 18, 2026 · Assigned by rapid7

CVE-2026-2329Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow

Critical 9.3

In plain English

A critical-severity stack buffer overflow in GXP1610 from Grandstream. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 41.7% (higher than 99% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code.

Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)41.7%top 1.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling2Metasploit, Public PoC

Official 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.

Affected products (as reported)

VendorProductVersions
Grandstream GXP1610 0 – through 1.0.7.80
Grandstream GXP1615 0 – through 1.0.7.80
Grandstream GXP1620 0 – through 1.0.7.80
Grandstream GXP1625 0 – through 1.0.7.80
Grandstream GXP1628 0 – through 1.0.7.80
Grandstream GXP1630 0 – through 1.0.7.80

Weakness: CWE-121 · 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

References