9.1Critical
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.
What this means for your business
- An attacker can use it remotely, over a network, with an administrator login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.5% chance of attack attempts being seen in the next 30 days, ranking above 42% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 9.1 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H- CVSS v4
- 8.5
- Weakness
- CWE-119
- Assigned by
- cna@vuldb.com
Dates
- Published
- 2026-09-15
- Last modified
- 2026-09-15
- Sources
- NVD
References
- https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.md
- https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.py
- https://vuldb.com/cve/CVE-2026-91003
- https://vuldb.com/submit/932002
- https://vuldb.com/vuln/403586
- https://vuldb.com/vuln/403586/cti
- https://www.dlink.com/
- https://github.com/Vivi-Xray/Xray-s-cve-/blob/main/rzgl/rzgl_asp.md