CVE-2025-7806
Published: 18 July 2025
Summary
CVE-2025-7806 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 18.1% 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, tracked as CVE-2025-7806, affects the Tenda FH451 router running firmware version 1.0.0.9. The flaw resides in the fromSafeClientFilter function within the /goform/SafeClientFilter endpoint, where improper handling of the Go/page argument allows an attacker to overflow a stack buffer. The issue is tracked under CWE-119 and CWE-121 and carries a CVSS 4.0 score of 7.4.
An authenticated remote attacker can send a crafted HTTP request to the affected endpoint, triggering the overflow to achieve arbitrary code execution or a denial of service on the device. Public exploit code has already been published, confirming that the attack requires no user interaction beyond network access and valid credentials.
The EPSS score remains flat at 0.0157 with no material increase since disclosure. Available references consist of proof-of-concept disclosures rather than vendor advisories, indicating that no official patch or mitigation guidance has been issued at this time.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21935
Vulnerability details
A vulnerability classified as critical was found in Tenda FH451 1.0.0.9. This vulnerability affects the function fromSafeClientFilter of the file /goform/SafeClientFilter. The manipulation of the argument Go/page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit…
more
has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the web management interface (/goform/SafeClientFilter) of the Tenda FH451 router enables remote exploitation of a public-facing application.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces validation of the Go/page argument in the fromSafeClientFilter function to prevent stack-based buffer overflow exploitation.
Provides memory protections such as stack canaries, ASLR, and DEP to mitigate stack-based buffer overflow attempts leading to arbitrary code execution.
Requires timely remediation of the identified buffer overflow flaw in Tenda FH451 firmware version 1.0.0.9 via patching or updates.