What is the CVSS score of CVE-2026-3729?

CVE-2026-3729 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-2026-3729?

A critical vulnerability in Tenda F453 routers allows remote attackers to compromise affected devices without authentication, potentially enabling unauthorized network access and data interception.

Is there a public PoC exploit available for CVE-2026-3729?

Yes, a public proof-of-concept exploit is available for CVE-2026-3729. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-3729?

Within 24 hours: Inventory all Tenda F453 1.0.0.3/3.As devices in your network and isolate them from critical systems if possible. Within 7 days: Disable PPTP functionality if not operationally required, and implement network access controls restricting PPTP services to authorized users only. Within 30 days: Plan replacement of affected Tenda F453 units with alternative vendors that provide active security support, or monitor for vendor patch release and apply immediately upon availability.

F453 Firmware CVE-2026-3729

HIGH

Buffer Overflow (CWE-119)

2026-03-08 cna@vuldb.com

Buffer Overflow Stack 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

Mar 09, 2026 - 15:24 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 11:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was identified in Tenda F453 1.0.0.3/3.As. Impacted is the function fromPptpUserAdd of the file /goform/PPTPDClient. Such manipulation of the argument username/opttype leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

AnalysisAI

Remote code execution in Tenda F453 firmware versions 1.0.0.3 and 3.As via stack-based buffer overflow in the PPTP client configuration endpoint allows unauthenticated network attackers to achieve full system compromise. Public exploit code exists for this vulnerability, and no patch is currently available, creating significant risk for affected devices.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects F453 Firmware. A vulnerability was identified in Tenda F453 1.0.0.3/3.As. Impacted is the function fromPptpUserAdd of the file /goform/PPTPDClient. Such manipulation of the argument username/opttype leads to stack-based buffer overflow. The attack can be executed 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.