CVE-2025-3538
Published: 13 April 2025
Summary
CVE-2025-3538 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Di-8100 Firmware. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation of Remote Services (T1210); ranked in the top 7.0% 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 vulnerability rated critical exists in the D-Link DI-8100 firmware version 16.07.26A1. It resides in the auth_asp function of the /auth.asp file within the jhttpd component and stems from improper handling of the callback argument, resulting in a stack-based buffer overflow. The issue is tracked under CWE-119, CWE-121, and CWE-787 and carries a CVSS 4.0 score of 8.7 reflecting high impact on confidentiality, integrity, and availability when exploited over an adjacent network.
An attacker on the local network can supply a crafted callback value to trigger the overflow without authentication or user interaction. Successful exploitation grants the ability to execute arbitrary code or crash the affected service, potentially leading to full device compromise. Public exploit code has already been released.
The EPSS score remains flat at 0.0938 with no material increase observed after disclosure. Reference materials point to a detailed proof-of-concept on GitHub and entries in VulDB, while the vendor site provides no specific patch or mitigation guidance in the available information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10852
Vulnerability details
A vulnerability was found in D-Link DI-8100 16.07.26A1. It has been rated as critical. This issue affects the function auth_asp of the file /auth.asp of the component jhttpd. The manipulation of the argument callback leads to stack-based buffer overflow. The…
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attack needs to be approached within the local network. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The unauthenticated stack-based buffer overflow in the jhttpd /auth.asp component enables remote command execution or denial of service within the local network, directly facilitating Exploitation of Remote Services (T1210).
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.