CVE-2025-4344
Published: 06 May 2025
Summary
CVE-2025-4344 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dir-600L Firmware. Its CVSS base score is 8.7 (High).
Operationally, ranked in the top 21.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A critical buffer overflow vulnerability designated CVE-2025-4344 affects the D-Link DIR-600L router up to firmware version 2.07B01. The flaw resides in the formLogin function, where improper handling of the host argument permits an attacker to trigger memory corruption. The issue is tracked under CWE-119 and CWE-120 and carries a CVSS 4.0 score of 8.7, reflecting network-accessible exploitation without authentication or user interaction. The product line is explicitly noted as unsupported by the vendor.
An authenticated remote attacker can supply a crafted host value to the formLogin endpoint and achieve arbitrary code execution or a denial-of-service condition on the device. Because the attack requires only low-privileged network access and no special conditions, successful exploitation can fully compromise the router’s integrity, confidentiality, and availability.
The referenced advisories and the vendor site confirm that the DIR-600L series is no longer maintained, indicating that no official patches will be issued. The associated EPSS score remains low and unchanged at 0.0115, with no observed increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-13589
Vulnerability details
A vulnerability, which was classified as critical, was found in D-Link DIR-600L up to 2.07B01. This affects the function formLogin. The manipulation of the argument host leads to buffer overflow. It is possible to initiate the attack remotely. This vulnerability…
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only affects products that are no longer supported by the maintainer.
- 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.
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.