What is the CVSS score of CVE-2025-69763?

CVE-2025-69763 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-2025-69763?

Organizations using Tenda AX3 firmware v16.03.12.11 face critical risk from CVE-2025-69763, a stack-based buffer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-69763?

Yes, a public proof-of-concept exploit is available for CVE-2025-69763. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2025-69763?

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-2025-69763

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-01-21 cve@mitre.org

RCE Stack Overflow Memory Corruption Ax3 Firmware Tenda

9.8

CVSS 3.1 · NVD

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

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 - 20:37 vuln.today

Public exploit code

CVE Published

Jan 21, 2026 - 18:16 nvd

CRITICAL 9.8

DescriptionCVE.org

Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formSetIptv via the vlanId parameter, which can cause memory corruption and enable remote code execution.

AnalysisAI

Tenda AX3 firmware has a second stack overflow in formSetIptv via the vlanId parameter, allowing remote code execution through the IPTV configuration endpoint.

Technical ContextAI

A separate stack buffer overflow in the formSetIptv function of Tenda AX3 firmware, triggered through the 'vlanId' parameter (CWE-121). Same root cause as CVE-2025-69762 but different input vector.