Buffer overflow in D-Link Di-8400
CVE-2025-9938
A weakness has been identified in D-Link DI-8400 16.07.26A1. The affected element is the function yyxz_dlink_asp of the file /yyxz.asp. This manipulation of the argument ID causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.001
Affected products
- D-Link Di-8400 — versions 16.07.26A1
- Dlink Di-8400 — versions a1
- Dlink Di-8400 Firmware — versions 16.07.26a1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp (related, Exploit, Third Party Advisory)
- github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp (Exploit, Third Party Advisory, exploit)
- www.dlink.com/ (Product, product)
Frequently asked questions
- What is CVE-2025-9938?
- CVE-2025-9938 is a high-severity vulnerability in D-Link Di-8400, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-09-04.
- How severe is CVE-2025-9938?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-9938 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.