What is the CVSS score of CVE-2025-71027?

CVE-2025-71027 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Ax3 Firmware are affected by CVE-2025-71027?

Organizations using Tenda AX-3 v16.03.12.10_CN face notable risk from CVE-2025-71027, a out-of-bounds write vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-71027?

Yes, a public proof-of-concept exploit is available for CVE-2025-71027. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-71027?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Ax3 Firmware CVE-2025-71027

HIGH

Out-of-bounds Write (CWE-787)

2026-01-13 cve@mitre.org

Stack Overflow Denial Of Service Ax3 Firmware Tenda

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 16, 2026 - 18:24 vuln.today

Public exploit code

CVE Published

Jan 13, 2026 - 16:16 nvd

HIGH 7.5

DescriptionCVE.org

Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

AnalysisAI

Technical ContextAI

Classified as CWE-787 (Out-of-bounds Write). Affects the a stack overflow in the wanMTU2 component of Ax3 Firmware. Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.