CVE-2025-6158
Published: 17 June 2025
Summary
CVE-2025-6158 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dir-655 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 17.9% 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 stack-based buffer overflow vulnerability designated CVE-2025-6158 affects the D-Link DIR-665 router running firmware version 1.00. The flaw exists in the sub_AC78 function of the HTTP POST Request Handler, where crafted input manipulation triggers the overflow; it is tracked under CWE-119 and CWE-121 and carries a CVSS 4.0 score of 7.4.
An authenticated remote attacker can exploit the issue over the network without user interaction to achieve full compromise of device confidentiality, integrity, and availability. Public proof-of-concept code has already been published, confirming that the attack is practical against the exposed HTTP service.
The product is explicitly unsupported by its maintainer, so no official patches or mitigations are available. The associated EPSS score remains flat at 0.0160 with no material rise since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18473
Vulnerability details
A vulnerability classified as critical has been found in D-Link DIR-665 1.00. This affects the function sub_AC78 of the component HTTP POST Request Handler. The manipulation leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The…
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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 HTTP POST Request Handler of the public-facing web interface on D-Link DIR-665 router enables remote exploitation of a public-facing application.
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.