What is the CVSS score of CVE-2026-3377?

CVE-2026-3377 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-2026-3377?

A high-severity vulnerability in Tenda F453 routers (CVE-2026-3377) allows remote attackers to compromise the Safe URL Filter function with an 8.8 CVSS score.

Is there a public PoC exploit available for CVE-2026-3377?

Yes, a public proof-of-concept exploit is available for CVE-2026-3377. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3377?

Within 24 hours: Inventory all Tenda F453 devices running version 1.0.0.3 and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict administrative access to affected devices and deploy WAF rules to block exploitation attempts against the /goform/SafeUrlFilter endpoint. Within 30 days: Plan device replacement or upgrade to alternative vendors, contact Tenda for patch availability status, and evaluate whether to disable Safe URL Filter functionality as a temporary measure.

F453 Firmware CVE-2026-3377

HIGH

Buffer Overflow (CWE-119)

2026-03-01 cna@vuldb.com

Buffer Overflow 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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 - 22:05 vuln.today

PoC Detected

Mar 03, 2026 - 17:34 vuln.today

Public exploit code

CVE Published

Mar 01, 2026 - 00:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was detected in Tenda F453 1.0.0.3. Affected by this issue is the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Performing a manipulation of the argument page results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

AnalysisAI

Buffer overflow in Tenda F453 1.0.0.3 firmware allows authenticated remote attackers to achieve complete system compromise through manipulation of the SafeUrlFilter page parameter. Public exploit code exists for this vulnerability, and no patch is currently available. An attacker with valid credentials can execute arbitrary code with full system privileges.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects F453 Firmware. A vulnerability was detected in Tenda F453 1.0.0.3. Affected by this issue is the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Performing a manipulation of the argument page results in buffer overflow. The attack can be initiated remotely. The exploit is now 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.