Quick answers
- Is CVE-2026-85223 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-85223 being exploited in the wild.
- How severe is CVE-2026-85223?
- Critical severity, with a CVSS score of 9.9, published 3 September 2026.
- Which products and versions are affected?
- D-Link DNS-340L 1.01B04.
- Is there a fix for CVE-2026-85223?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-85223 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-85223?
- Check whether you run D-Link DNS-340L at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This is an OS command injection vulnerability in the CGI Handler component of D-Link DNS-340L firmware version 1.01B04. The vulnerable endpoint /cgi-bin/dropbox.cgi fails to properly sanitize user-supplied input in the callback_url and sync_interval parameters before passing them to system commands. The attack is network-reachable and requires no authentication. An attacker can execute arbitrary shell commands with the privileges of the web server process, typically leading to full device compromise. A public exploit exists for this vulnerability.
Affected products
- D-Link DNS-340L 1.01B04
Timeline
- 2026-09-03: disclosed
- other: Exploit made public