CVE-2026-3726
Published: 08 March 2026
Summary
CVE-2026-3726 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda F453 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 45.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-3726 is a stack-based buffer overflow vulnerability (CWE-119, CWE-121) in Tenda F453 firmware version 1.0.0.3. The flaw affects the fromwebExcptypemanFilter function in the /goform/webExcptypemanFilter file, where manipulation of the "page" argument triggers the overflow. Published on 2026-03-08, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
The vulnerability enables remote exploitation over the network by attackers with low privileges, such as authenticated users, requiring low attack complexity and no user interaction. Successful exploitation can result in high impacts to confidentiality, integrity, and availability, potentially allowing arbitrary code execution. A public exploit disclosure exists and may be actively used.
Advisories referenced in VulDB (ctiid.349704, id.349704, submit.766931) and a GitHub repository (https://github.com/Litengzheng/vul_db/blob/main/F453/vul_85/README.md) detail the issue, with the vendor site at https://www.tenda.com.cn/ listed for further information. No specific patch or mitigation steps are outlined in the disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-10229
Vulnerability details
A vulnerability has been found in Tenda F453 1.0.0.3. This affects the function fromwebExcptypemanFilter of the file /goform/webExcptypemanFilter. The manipulation of the argument page leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed…
more
to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in public-facing web management interface (/goform/webExcptypemanFilter) of Tenda F453 router firmware enables remote code execution for authenticated users, directly mapping to exploitation of public-facing applications.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation of the 'page' argument in the /goform/webExcptypemanFilter endpoint to prevent stack-based buffer overflows from improper input handling.
Mandates timely remediation of the identified buffer overflow flaw in Tenda F453 firmware version 1.0.0.3 via patching or updates.
Implements memory protection mechanisms like stack canaries and non-executable stacks to mitigate exploitation of stack-based buffer overflows.