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CVE-2026-2329

Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow

Published: Feb 18, 2026Updated: Feb 20, 2026 Sources: CVE List NVD BDUCWE-121
9.8CRITICAL
NVD MITRE
EPSS Score
40.0%
Top 1.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-121

Affected Products

GXP1610GrandstreamCommunications
GXP1615GrandstreamCommunications
GXP1620GrandstreamCommunications
GXP1625GrandstreamCommunications
GXP1628GrandstreamCommunications
grandstreamcommercialUSCommunicationsaka grandstream networks
and 7 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdf
firmware.grandstream.com
https://github.com/rapid7/metasploit-framework/pull/20983
github.com
https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixed/
rapid7.com
and 5 more references View all →

Timeline

Published
Feb 18, 2026
Last Updated
Feb 20, 2026
News mentions
1

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