CVE-2025-5912
Published: 10 June 2025
Summary
CVE-2025-5912 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dir-632 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 18.8% 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 do_file function of the HTTP POST Request Handler in D-Link DIR-632 firmware version FW103B08. The flaw is triggered by specially crafted input supplied over the network and has been assigned CWE-119 and CWE-121. It affects only an end-of-life device that is no longer supported by the vendor and carries a CVSS 4.0 score of 7.4.
An authenticated remote attacker can send a malicious HTTP POST request to overflow the stack buffer, resulting in arbitrary code execution with high impact on confidentiality, integrity, and availability. Public proof-of-concept code demonstrating the attack has been published on GitHub.
The EPSS score remains flat at 0.0145 with no material increase since disclosure, indicating limited observed exploitation interest to date. No vendor patches are available because the product is unsupported.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-17618
Vulnerability details
A vulnerability was found in D-Link DIR-632 FW103B08. It has been declared as critical. This vulnerability affects the function do_file of the component HTTP POST Request Handler. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely.…
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The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the do_file function of the HTTP POST Request Handler on the public-facing D-Link DIR-632 router web interface enables remote exploitation for initial access.
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.