What is the CVSS score of CVE-2026-3378?

CVE-2026-3378 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-2026-3378?

A high-severity vulnerability (CVSS 8.8) has been discovered in Tenda F453 wireless routers affecting QoS settings, with public exploits already available.

Is there a public PoC exploit available for CVE-2026-3378?

Yes, a public proof-of-concept exploit is available for CVE-2026-3378. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3378?

Within 24 hours: Audit all deployed Tenda F453 devices in your environment and isolate affected units from critical network segments. Within 7 days: Implement network segmentation to restrict administrative access to these devices and monitor for suspicious QoS configuration changes. Within 30 days: Replace affected Tenda F453 units with patched firmware versions once available, or deploy alternative router models from vendors with active security support.

F453 Firmware CVE-2026-3378

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 - 03:16 nvd

HIGH 8.8

DescriptionCVE.org

A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromqossetting of the file /goform/qossetting. Executing a manipulation of the argument qos can lead to buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.

AnalysisAI

Remote code execution in Tenda F453 Firmware 1.0.0.3 allows authenticated attackers to achieve complete system compromise through a buffer overflow in the QoS settings parameter. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected devices at immediate risk.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to Tenda F453 web interface

Delivery

Send crafted HTTP POST request to /goform/qossetting

Exploit

Manipulate qos parameter with oversized payload

Execution

Trigger buffer overflow in fromqossetting function

Impact

Execute arbitrary code with device privileges

Access

Authenticate to Tenda F453 web interface

Delivery

Send crafted HTTP POST request to /goform/qossetting

Exploit

Manipulate qos parameter with oversized payload

Execution

Trigger buffer overflow in fromqossetting function

Impact

Execute arbitrary code with device privileges

Vulnerability AssessmentAI

Exploitation	Tenda F453 firmware version 1.0.0.3; authenticated access to web management interface (/goform/qossetting endpoint); qos parameter processing in fromqossetting function must lack input validation on buffer length. 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 vulnerability to buffer overflow.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Audit all deployed Tenda F453 devices in your environment and isolate affected units from critical network segments. …

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

CVE-2026-3378 vulnerability details – vuln.today

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F453 Firmware CVE-2026-3378

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