CVE-2025-5794
Published: 06 June 2025
Summary
CVE-2025-5794 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Ac5 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.
Deeper analysis
A critical buffer overflow vulnerability, tracked as CVE-2025-5794 and assigned CWE-119 and CWE-120, affects the Tenda AC5 wireless router running firmware 15.03.06.47. The flaw resides in the formSetPPTPUserList function within the /goform/setPptpUserList endpoint, where improper handling of the list argument allows an attacker to overwrite memory regions.
Remote attackers who possess valid low-privileged credentials can trigger the overflow to execute arbitrary code or crash the device, resulting in full compromise of confidentiality, integrity, and availability. The CVSS 4.0 score of 7.4 reflects network attack vector, low complexity, and no required user interaction. Public exploit code has already been disclosed.
The EPSS score remains flat at 0.0157 with no observed rise after publication, indicating limited in-the-wild exploitation interest to date. Reference materials point to detailed technical write-ups on public sites and the vendor homepage, though no official patch or mitigation guidance is included in the available advisories.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-17362
Vulnerability details
A vulnerability, which was classified as critical, has been found in Tenda AC5 15.03.06.47. Affected by this issue is the function formSetPPTPUserList of the file /goform/setPptpUserList. The manipulation of the argument list leads to buffer overflow. The attack may be…
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launched remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in the router's public-facing web interface (/goform/setPptpUserList) enables remote exploitation for initial access (T1190) and application/system denial of service via crash (T1499.004).
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.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
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.