What is the CVSS score of CVE-2026-2329?

CVE-2026-2329 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 41.1%.

Is there a public PoC exploit available for CVE-2026-2329?

Yes, a public proof-of-concept exploit is available for CVE-2026-2329. Prioritise patching immediately. EPSS: 41.1%.

How to fix or mitigate CVE-2026-2329?

Within 24 hours: Identify and inventory all affected devices running vulnerable versions; isolate or restrict network access to the /cgi-bin/api.values.get endpoint if immediate patching is not feasible. Within 7 days: Apply the available vendor patch to all affected systems in a staged rollout, prioritizing critical and internet-facing assets. Within 30 days: Complete patching of all remaining systems, validate patch deployment, and conduct vulnerability rescans to confirm remediation.

Gxp1610 Firmware CVE-2026-2329

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-02-18 cve@rapid7.com

RCE Buffer Overflow Stack Overflow Gxp1610 Firmware Gxp1615 Firmware Gxp1620 Firmware Gxp1625 Firmware Gxp1628 Firmware Gxp1630 Firmware Grandstream

9.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send crafted HTTP request to /cgi-bin/api.values.get
Exploit

Trigger stack-based buffer overflow
Execution

Overwrite return pointer
Impact

Execute arbitrary code as root

Vulnerability Assessment

Weakness	CWE CWE-121 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Stack buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against default configurations of GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630 devices with HTTP API endpoint accessible.
Impact	CVSS 9.8, EPSS 41.1%. Extremely high exploitation probability. CGI-based devices are likely IoT/embedded systems with limited security hardening.
Exploit ScenarioDerived	Attacker sends oversized HTTP request to /cgi-bin/api.values.get, overflows stack buffer, achieves remote code execution on the embedded device.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

Patch available 41.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Unauthenticated stack-based buffer overflow in /cgi-bin/api.values.get HTTP API endpoint. EPSS 41.1% indicates very high exploitation probability. Patch available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 9.8

Stack buffer overflow in HTTP API endpoint — high exploitation likelihood.

RemediationAI

Apply firmware patch immediately given 41% EPSS score. Restrict HTTP API access.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-121 unauthenticated stack overflow in CGI-based HTTP API. The api.values.get endpoint processes requests without bounds checking.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Feb 20, 2026 - 20:57 nvd

Patch available

CVE Published

Feb 18, 2026 - 15:18 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

A critical unauthenticated remote code execution vulnerability (CVE-2026-2329, CVSS 9.8) affects the HTTP API endpoint and allows attackers to gain root-level control of affected devices without credentials. An attacker can exploit this vulnerability to compromise systems, steal data, deploy malware, or disrupt operations, requiring immediate patching across all affected infrastructure.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If patch deployment is delayed, implement: (1) WAF rules to block requests to /cgi-bin/api.values.get from untrusted sources, (2) network segmentation to restrict API endpoint access to authorized internal networks only, (3) disable the vulnerable HTTP API endpoint if operationally feasible, and (4) deploy intrusion detection signatures for exploitation attempts.

Threat Intelligence Overview

Threat Score

4.7/10

Composite threat intelligence

EPSS Score

41.1%

Top 3% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS POC (1)

GitHub Metasploit

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 41.1%

Patch available Yes

Active threat Yes

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

125

Low Medium High Critical

KEV: 0

EPSS: +41

CVSS: +49

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Stack-based Buffer Overflow HIGH

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.