What is the CVSS score of CVE-2026-2911?

CVE-2026-2911 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 Fh451 Firmware are affected by CVE-2026-2911?

A high-severity vulnerability (CVE-2026-2911) affects Tenda FH451 routers up to version 1.0.0.9 with an active public exploit available.

Is there a public PoC exploit available for CVE-2026-2911?

Yes, a public proof-of-concept exploit is available for CVE-2026-2911. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2911?

Within 24 hours: Inventory all Tenda FH451 devices in production and assess network exposure; isolate or restrict access to affected devices if possible. Within 7 days: Contact Tenda for patch availability and timeline; implement network segmentation to limit device accessibility. Within 30 days: Deploy patches immediately upon availability, or plan device replacement if no patch is released; conduct network assessment for signs of compromise.

Fh451 Firmware CVE-2026-2911

HIGH

Buffer Overflow (CWE-119)

2026-02-22 cna@vuldb.com

Buffer Overflow Tenda Fh451 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 - 22:04 vuln.today

PoC Detected

Feb 23, 2026 - 20:21 vuln.today

Public exploit code

CVE Published

Feb 22, 2026 - 04:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability has been found in Tenda FH451 up to 1.0.0.9. This issue affects some unknown processing of the file /goform/GstDhcpSetSer. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

Buffer overflow in Tenda FH451 firmware versions up to 1.0.0.9 allows authenticated remote attackers to achieve code execution through crafted requests to the /goform/GstDhcpSetSer endpoint. Public exploit code exists for this vulnerability, and no patch is currently available, leaving all affected devices at risk.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Fh451 Firmware. A vulnerability has been found in Tenda FH451 up to 1.0.0.9. This issue affects some unknown processing of the file /goform/GstDhcpSetSer. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may 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.