CVE-2025-7794
Published: 18 July 2025
Summary
CVE-2025-7794 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Fh451 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 31.7% of CVEs by exploit likelihood; 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).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the stack-based buffer overflow in the fromNatStaticSetting function by identifying, patching, and deploying firmware updates for the Tenda FH451.
Requires validation of the 'page' argument in /goform/NatStaticSetting to block malformed inputs that trigger the buffer overflow.
Deploys memory protections such as stack canaries and non-executable stacks to prevent arbitrary code execution from the stack buffer overflow.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in router web form (fromNatStaticSetting) directly enables remote code execution against a public-facing network device interface.
NVD Description
A vulnerability classified as critical was found in Tenda FH451 1.0.0.9. Affected by this vulnerability is the function fromNatStaticSetting of the file /goform/NatStaticSetting. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be launched remotely.…
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The exploit has been disclosed to the public and may be used.
Deeper analysisAI
CVE-2025-7794 is a critical stack-based buffer overflow vulnerability (CVSS 3.1 score of 8.8; CWE-119, CWE-121) in Tenda FH451 routers running firmware version 1.0.0.9. The flaw affects the fromNatStaticSetting function in the /goform/NatStaticSetting component, where manipulation of the "page" argument triggers the overflow.
Remote attackers with low privileges (PR:L), such as authenticated users, can exploit this vulnerability over the network (AV:N) with low attack complexity (AC:L) and no user interaction (UI:N). Successful exploitation results in high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), potentially enabling arbitrary code execution.
Advisories referenced on VulDB (ctiid.316855, id.316855) and GitHub repositories detail the vulnerability, including a proof-of-concept exploit for the fromNatStaticSetting endpoint. No patches or specific mitigations are mentioned in the provided disclosures.
The exploit has been publicly disclosed, which may facilitate its use in real-world attacks against unpatched Tenda FH451 devices.
Details
- CWE(s)