Buffer overflow in D-Link Di-8100
CVE-2026-7857
A vulnerability has been found in D-Link DI-8100 16.07.26A1. This vulnerability affects the function sprintf of the file /user_group.asp of the component CGI Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.042 (90.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.042 · change: +0.029
Affected products
- D-Link Di-8100 — versions 16.07.26A1
- Dlink Di-8100
- Dlink Di-8100 Firmware — versions 16.07.26a1
Weakness classification (CWE)
References
- vuldb.com/vuln/361134 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/361134/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/807853 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/draw-ctf/report/blob/main/DI-8100/user_group_asp_overflow.md (Exploit, Third Party Advisory, exploit)
- www.dlink.com/ (Product, product)
Frequently asked questions
- What is CVE-2026-7857?
- CVE-2026-7857 is a high-severity vulnerability in D-Link Di-8100, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.2/10. Published 2026-05-05.
- How severe is CVE-2026-7857?
- High severity. CVSS v3 base score is 7.2 out of 10.