Buffer overflow in D-Link Di-8300
CVE-2026-91003
A flaw has been found in D-Link DI-8300 16.07. The affected element is the function rzgl_asp of the file /rzgl.asp of the component CGI Service. This manipulation of the argument redirct_url causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (62.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- D-Link Di-8300 — versions 16.07
Weakness classification (CWE)
References
- vuldb.com/vuln/403586 (technical-description, vdb-entry)
- vuldb.com/vuln/403586/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-91003 (third-party-advisory)
- vuldb.com/submit/932002 (third-party-advisory)
- github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.md (related)
- github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.py (exploit)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-91003?
- CVE-2026-91003 is a critical-severity vulnerability in D-Link Di-8300, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.1/10. Published 2026-09-15.
- How severe is CVE-2026-91003?
- Critical severity. CVSS v3 base score is 9.1 out of 10.