What is the CVSS score of CVE-2026-3399?

CVE-2026-3399 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-2026-3399?

A critical vulnerability affecting Tenda F453 wireless routers allows remote attackers to compromise network infrastructure through the DHCP configuration interface.

Is there a public PoC exploit available for CVE-2026-3399?

Yes, a public proof-of-concept exploit is available for CVE-2026-3399. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3399?

Within 24 hours: Inventory all Tenda F453 1.0.0.3 devices in production and isolate affected units from critical networks. Within 7 days: Implement network segmentation to restrict administrative access to these devices and deploy WAF/IDS rules blocking exploitation attempts. Within 30 days: Replace affected Tenda F453 units with alternative vendors or contact Tenda for firmware availability; if replacement is impossible, maintain strict access controls and continuous monitoring.

F453 Firmware CVE-2026-3399

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 - 17:31 vuln.today

Public exploit code

CVE Published

Mar 01, 2026 - 23:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was identified in Tenda F453 1.0.0.3. Affected by this vulnerability is the function fromGstDhcpSetSer of the file /goform/GstDhcpSetSer of the component httpd. The manipulation of the argument dips leads to buffer overflow. The attack may be initiated remotely. The exploit is publicly available and might be used.

AnalysisAI

Remote code execution in Tenda F453 firmware versions 1.0.0.3 and earlier results from a buffer overflow in the httpd component's DHCP configuration handler. An authenticated attacker can exploit this vulnerability over the network to achieve complete system compromise, and public exploit code is currently available.

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 fromGstDhcpSetSer of the file /goform/GstDhcpSetSer of the component httpd. The manipulation of the argument dips leads to buffer overflow. The attack may be initiated 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.