What is the CVSS score of CVE-2026-3166?

CVE-2026-3166 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of F453 Firmware are affected by CVE-2026-3166?

CVE-2026-3166 is a high-severity vulnerability affecting Tenda F453 routers with no available patch, creating immediate risk for organizations using this equipment.

Is there a public PoC exploit available for CVE-2026-3166?

Yes, a public proof-of-concept exploit is available for CVE-2026-3166. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3166?

Within 24 hours: Identify and inventory all Tenda F453 1.0.0.3 devices across your network and isolate them from critical systems if possible. Within 7 days: Implement network segmentation to restrict access to affected devices and deploy WAF rules to block exploitation attempts on the /goform/RouteStatic endpoint. Within 30 days: Develop a device replacement or upgrade plan to migrate away from F453 1.0.0.3 to patched alternatives, establishing a timeline for full remediation.

F453 Firmware CVE-2026-3166

HIGH

Buffer Overflow (CWE-119)

2026-02-25 cna@vuldb.com

Buffer Overflow Tenda F453 Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/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

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 25, 2026 - 17:53 vuln.today

Public exploit code

CVE Published

Feb 25, 2026 - 07:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was identified in Tenda F453 1.0.0.3. The affected element is the function fromRouteStatic of the file /goform/RouteStatic of the component httpd. Such manipulation of the argument page leads to buffer overflow. The attack can be launched remotely. The exploit is publicly available and might be used.

AnalysisAI

Remote code execution in Tenda F453 firmware version 1.0.0.3 exists through a buffer overflow in the httpd component's RouteStatic function when processing the page parameter. An unauthenticated attacker on the network can exploit this vulnerability to execute arbitrary code with full system privileges. Public exploit code is available and no patch is currently available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects F453 Firmware. A vulnerability was identified in Tenda F453 1.0.0.3. The affected element is the function fromRouteStatic of the file /goform/RouteStatic of the component httpd. Such manipulation of the argument page leads to buffer overflow. The attack can be launched remotely. The exploit is publicly available and might be used.

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.