CVE-2025-3693
Published: 16 April 2025
Summary
CVE-2025-3693 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda W12 Firmware. Its CVSS base score is 8.7 (High).
Operationally, ranked in the top 8.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A stack-based buffer overflow vulnerability exists in the Tenda W12 wireless router running firmware version 3.0.0.5. The flaw resides in the cgiWifiRadioSet function within the /bin/httpd binary and stems from improper handling of input supplied to the affected CGI endpoint, corresponding to CWE-119 and CWE-121.
An attacker with network access and low-level privileges can send a crafted request to the web management interface, triggering the overflow to achieve arbitrary code execution or a denial-of-service condition on the device. The CVSS 4.0 score of 8.7 reflects the remote attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability.
Publicly available references, including a detailed disclosure on GitHub and entries in VulDB, indicate that exploit code has been released. The EPSS score rose from a low baseline to a peak of 0.1117 on 2026-05-25 before receding to the current value of 0.0730, indicating a measurable increase in exploitation interest after the vulnerability was published. No vendor advisory or patch information is provided in the referenced sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-11282
Vulnerability details
A vulnerability was found in Tenda W12 3.0.0.5. It has been rated as critical. Affected by this issue is the function cgiWifiRadioSet of the file /bin/httpd. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The…
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exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.