CVE-2025-4355
Published: 06 May 2025
Summary
CVE-2025-4355 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dap-1520 Firmware. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 19.0% 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 heap-based buffer overflow vulnerability exists in the Tenda DAP-1520 wireless access point running firmware version 1.10B04_BETA02. The flaw resides in the set_ws_action function of the /dws/api/ endpoint and stems from improper handling of attacker-supplied input, which can corrupt heap memory. The issue is tracked as CVE-2025-4355, carries a CVSS 4.0 score of 8.7, and is also associated with CWE-119, CWE-122, and CWE-787.
An authenticated remote attacker can send a crafted request to the affected endpoint and achieve arbitrary code execution or a denial-of-service condition on the device. Public proof-of-concept material has already been published, confirming that the attack can be launched over the network without user interaction.
The EPSS score remains flat at 0.0142 with no observed increase after disclosure. No vendor advisory or firmware update addressing the flaw is referenced in the available sources.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-13602
Vulnerability details
A vulnerability was found in Tenda DAP-1520 1.10B04_BETA02. It has been classified as critical. This affects the function set_ws_action of the file /dws/api/. The manipulation leads to heap-based buffer overflow. It is possible to initiate the attack 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?
The heap-based buffer overflow in the remotely accessible /dws/api/set_ws_action endpoint of the Tenda DAP-1520 router is a public-facing application vulnerability that enables remote exploitation, likely leading to code execution.
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.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
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.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.