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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.

CVE-2026-2329 is a stack-based buffer overflow vulnerability classified under CWE-121, found in the HTTP API endpoint /cgi-bin/api.values.get of Grandstream GXP1610 series VoIP phones, including models GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630. This vulnerability allows a remote attacker to send specially crafted HTTP requests to the affected endpoint without any authentication or user interaction, triggering a buffer overflow that can lead to arbitrary code execution with root privileges on the device. The vulnerability impacts the device's confidentiality, integrity, and availability by enabling full system compromise, potentially allowing attackers to intercept calls, manipulate device configurations, or use the device as a foothold for lateral movement within a network. The CVSS 4.0 score of 9.3 reflects the vulnerability's critical nature, with network attack vector, no required privileges or user interaction, and high impact on all security properties. Although no public exploits have been reported yet, the vulnerability's characteristics make it highly exploitable once a proof-of-concept or exploit is developed. The affected devices are commonly deployed in enterprise and SMB telephony environments, making this a significant risk for organizations relying on these models for communication. The lack of available patches at the time of disclosure necessitates immediate mitigation steps to reduce exposure.

Detailed information about CVE-2026-2329: CWE-121 Stack-based Buffer Overflow in Grandstream GXP1610 affecting Grandstream GXP1610. Get real-time updates, techn

CVE-2026-2329: CWE-121 Stack-based Buffer Overflow in Grandstream GXP1610 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-2329: CWE-121 Stack-based Buffer Overflow in Grandstream GXP1610

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