What is the CVSS score of CVE-2025-69766?

CVE-2025-69766 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: 0.4%.

Which versions of Ax3 Firmware are affected by CVE-2025-69766?

Organizations using Tenda AX3 firmware v16.03.12.11 face critical risk from CVE-2025-69766, a stack-based buffer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-69766?

Yes, a public proof-of-concept exploit is available for CVE-2025-69766. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2025-69766?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Ax3 Firmware CVE-2025-69766

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-01-21 cve@mitre.org

RCE Buffer Overflow Memory Corruption Stack Overflow Tenda Ax3 Firmware

9.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 26, 2026 - 20:38 vuln.today

Public exploit code

CVE Published

Jan 21, 2026 - 18:16 nvd

CRITICAL 9.8

DescriptionNVD

Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to improper handling of the citytag stack buffer, which may result in memory corruption and remote code execution.

AnalysisAI

Tenda AX3 firmware has a third stack-based buffer overflow in formGetIptv, allowing unauthenticated remote code execution through the router's web interface.

Technical ContextAI

The formGetIptv function in Tenda AX3 firmware v16.03.12.11 has a CWE-121 stack-based buffer overflow due to improper handling of input parameters, the third overflow discovered in IPTV-related handlers.

RemediationAI

Update firmware. Disable IPTV features if not used. Segment IoT/router management networks.

CVE-2025-69766 vulnerability details – vuln.today

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Ax3 Firmware CVE-2025-69766

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code