What is the CVSS score of CVE-2026-3275?

CVE-2026-3275 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-2026-3275?

A critical vulnerability in Tenda F453 routers (CVE-2026-3275) allows remote attackers to exploit NAT configuration functions with an 8.8 CVSS severity rating.

Is there a public PoC exploit available for CVE-2026-3275?

Yes, a public proof-of-concept exploit is available for CVE-2026-3275. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3275?

Within 24 hours: Identify all Tenda F453 1.0.0.3 devices in production and isolate them from critical network segments; document inventory and affected business functions. Within 7 days: Implement network-based mitigations (WAF rules, access restrictions); contact Tenda for patch timeline and evaluate device replacement options. Within 30 days: Complete migration to patched firmware versions or replace affected devices; verify remediation through penetration testing.

F453 Firmware CVE-2026-3275

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 - 15:46 vuln.today

Public exploit code

CVE Published

Feb 27, 2026 - 02:16 nvd

HIGH 8.8

DescriptionCVE.org

A weakness has been identified in Tenda F453 1.0.0.3. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Executing a manipulation of the argument entrys can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

AnalysisAI

Remote code execution in Tenda F453 firmware allows authenticated attackers to achieve complete system compromise through a buffer overflow in the httpd address NAT function. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected devices at immediate risk.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects F453 Firmware. A weakness has been identified in Tenda F453 1.0.0.3. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Executing a manipulation of the argument entrys can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

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.