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

Quick assessment

Affected
Grandstream GXP1610
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grandstream GXP series是美国Grandstream公司的一系列IP电话。 Grandstream GXP series存在安全漏洞，该漏洞源于/cgi-bin/api.values.get HTTP API端点存在未经身份验证的基于栈的缓冲区溢出，可能导致未经身份验证的远程代码执行。以下产品受到影响：GXP1610、GXP1615、GXP1620、GXP1625、GXP1628和GXP1630。

AI Predicted 10.0 Difficulty: Easy EPSS 41.27% · P99

Public Exploits 1

Metasploit · 1 grandstream_gxp1600_unauth_rce.rb [exploit]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-2329

Vulnerability Information
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Vulnerability Title
Grandstream GXP1600 VoIP Phones - Unauthenticated stack buffer overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Grandstream GXP series 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grandstream GXP series是美国Grandstream公司的一系列IP电话。 Grandstream GXP series存在安全漏洞，该漏洞源于/cgi-bin/api.values.get HTTP API端点存在未经身份验证的基于栈的缓冲区溢出，可能导致未经身份验证的远程代码执行。以下产品受到影响：GXP1610、GXP1615、GXP1620、GXP1625、GXP1628和GXP1630。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Grandstream GXP1610 0 ~ 1.0.7.80 -
Grandstream GXP1615 0 ~ 1.0.7.80 -
Grandstream GXP1620 0 ~ 1.0.7.80 -
Grandstream GXP1625 0 ~ 1.0.7.80 -
Grandstream GXP1628 0 ~ 1.0.7.80 -
Grandstream GXP1630 0 ~ 1.0.7.80 -

II. Public POCs for CVE-2026-2329

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-2329

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Patches & Fixes for CVE-2026-2329 (1)

Vendor Advisories for CVE-2026-2329 (1)

IV. Related Vulnerabilities

Same vendor: Grandstream
Same weakness: CWE-121

V. Comments for CVE-2026-2329

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