CVE-2025-7793
Published: 18 July 2025
Summary
CVE-2025-7793 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 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 17.5% 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).
Deeper analysis
A critical stack-based buffer overflow vulnerability has been identified in Tenda FH451 version 1.0.0.9. The flaw resides in the formWebTypeLibrary function of the /goform/webtypelibrary endpoint and is triggered by unsanitized input to the webSiteId argument, corresponding to CWE-119 and CWE-121. The vulnerability is remotely reachable and carries a CVSS 4.0 score of 7.4 with network attack vector, low complexity, and low privileges required.
An authenticated remote attacker can supply a crafted webSiteId value to corrupt the stack and achieve arbitrary code execution or a denial-of-service condition on the affected device. Public proof-of-concept code demonstrating the exploit has already been published.
The associated EPSS score remains flat at 0.0167 with no material rise since disclosure, indicating limited observed exploitation interest to date. No vendor advisory or patch information is referenced in the available sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21907
Vulnerability details
A vulnerability classified as critical has been found in Tenda FH451 1.0.0.9. Affected is the function formWebTypeLibrary of the file /goform/webtypelibrary. The manipulation of the argument webSiteId leads to stack-based buffer overflow. It is possible to launch the attack remotely.…
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The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct stack-based buffer overflow in router web form handler enables remote authenticated RCE against a public-facing network device service.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 mandates timely identification, reporting, and correction of flaws like this stack-based buffer overflow, directly eliminating the vulnerability through patching.
SI-10 enforces information input validation at entry points such as the webSiteId argument in /goform/webtypelibrary, preventing the buffer overflow exploitation.
SI-16 implements memory protection mechanisms like stack canaries and DEP that directly mitigate stack-based buffer overflow attempts leading to arbitrary code execution.