What is the CVSS score of CVE-2026-3274?

CVE-2026-3274 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-2026-3274?

A critical vulnerability in Tenda F453 routers (CVSS 8.8) allows remote attackers to compromise network infrastructure through the L7 protocol filtering function.

Is there a public PoC exploit available for CVE-2026-3274?

Yes, a public proof-of-concept exploit is available for CVE-2026-3274. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3274?

Within 24 hours: Inventory all Tenda F453 devices across the organization and isolate affected units from critical network segments if patching cannot be completed immediately. Within 7 days: Implement network segmentation to restrict access to affected devices and deploy WAF rules to block malicious requests to /goform/L7Prot endpoint. Within 30 days: Replace vulnerable devices with patched firmware versions when available from Tenda, or migrate to alternative router solutions with confirmed security posture.

F453 Firmware CVE-2026-3274

HIGH

Buffer Overflow (CWE-119)

2026-02-27 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 - 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 security flaw has been discovered in Tenda F453 1.0.0.3. Affected by this issue is the function frmL7ProtForm of the file /goform/L7Prot of the component httpd. Performing a manipulation of the argument page results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

AnalysisAI

Remote code execution in Tenda F453 firmware through a buffer overflow in the L7Prot HTTP handler allows unauthenticated attackers to achieve full system compromise via a malicious page parameter. Public exploit code exists for this vulnerability, increasing the risk of widespread attacks. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to Tenda F453 httpd

Delivery

Send crafted request to /goform/L7Prot

Exploit

Manipulate page parameter in frmL7ProtForm

Execution

Overflow buffer in L7 protection handler

Impact

Execute arbitrary code

Access

Authenticate to Tenda F453 httpd

Delivery

Send crafted request to /goform/L7Prot

Exploit

Manipulate page parameter in frmL7ProtForm

Execution

Overflow buffer in L7 protection handler

Impact

Execute arbitrary code

Vulnerability AssessmentAI

Exploitation	Tenda F453 firmware 1.0.0.3 with httpd enabled; attacker must possess valid login credentials to access /goform/L7Prot endpoint for L7 protocol filtering configuration. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker could exploit this flaw, buffer overflow.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all Tenda F453 devices across the organization and isolate affected units from critical network segments if patching cannot be completed immediately. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-3274 vulnerability details – vuln.today

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F453 Firmware CVE-2026-3274

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

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External POC / Exploit Code