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IMMUNITYSEC

CVE-2026-2329

Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow

9.3
CRITICAL
CVSS 4.0
EPSS 40.6% · 99th pctCWE-121
2026-02-18

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.

Severity

CVSS 4.0 · CNA9.3 CRITICAL
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
SSVC · CISA-ADP
Exploitationpoc
Automatableyes
Technical impacttotal

Affected Products

VendorProductAffected versions
GrandstreamGXP1610
0 to 1.0.7.80
GrandstreamGXP1615
0 to 1.0.7.80
GrandstreamGXP1620
0 to 1.0.7.80
GrandstreamGXP1625
0 to 1.0.7.80
GrandstreamGXP1628
0 to 1.0.7.80
GrandstreamGXP1630
0 to 1.0.7.80

References

4 Links

Record Details

Published
2026-02-18
Last updated
2026-02-18
Assigner (CNA)
rapid7
Credited to
Stephen Fewer, Senior Principal Security Researcher at Rapid7

Related Tool Categories

Tool categories that test for or protect against this vulnerability class.

CWE-121 · Stack-based Buffer Overflow
FuzzingBinary Exploitation

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.