What is the CVSS score of CVE-2026-3273?

CVE-2026-3273 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-2026-3273?

A HIGH severity vulnerability (CVSS 8.8) affects Tenda F453 wireless routers with no available patch, potentially allowing attackers to compromise network security configurations remotely.

Is there a public PoC exploit available for CVE-2026-3273?

Yes, a public proof-of-concept exploit is available for CVE-2026-3273. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3273?

Within 24 hours: Inventory all Tenda F453 1.0.0.3 devices in your environment and isolate affected units from critical network segments. Within 7 days: Implement network-level compensating controls including WAF rules blocking access to /goform/AdvSetWrlsafeset and restrict administrative access to these devices via network segmentation. Within 30 days: Develop a replacement strategy for affected devices, prioritizing those in high-risk locations, and evaluate alternative router vendors with active security patch support.

F453 Firmware CVE-2026-3273

HIGH

Buffer Overflow (CWE-119)

2026-02-27 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 27, 2026 - 15:47 vuln.today

Public exploit code

CVE Published

Feb 27, 2026 - 01:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was identified in Tenda F453 1.0.0.3. Affected by this vulnerability is the function formWrlsafeset of the file /goform/AdvSetWrlsafeset of the component httpd. Such manipulation of the argument mit_ssid_index leads to buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

AnalysisAI

Remote code execution in Tenda F453 firmware version 1.0.0.3 allows authenticated attackers to execute arbitrary code via a buffer overflow in the wireless security settings endpoint. The vulnerability exists in the httpd component's formWrlsafeset function and can be triggered through manipulation of the mit_ssid_index parameter. Public exploit code is available and no patch has been released.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects F453 Firmware. A vulnerability was identified in Tenda F453 1.0.0.3. Affected by this vulnerability is the function formWrlsafeset of the file /goform/AdvSetWrlsafeset of the component httpd. Such manipulation of the argument mit_ssid_index leads to buffer overflow. The attack can be executed 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.