CVE-2026-82689: D-Link DNS-320l

Critical severity, CVSS 9.9. EPSS: 3.3% chance of exploitation in the next 30 days.

A vulnerability was detected in D-Link DNS-320L, DNS-327L, DNS-340L and DNS-345 up to 20260717. Affected is an unknown function of the file /cgi-bin/isomount_mgr.cgi of the component ISO Image Handler. The manipulation of the argument upIsoRootPath results in os command injection. The attack can be executed remotely. The exploit is now public and may be used.

Affected products

• D-Link DNS-320l: version 20260717 only
• D-Link DNS-327l: version 20260717 only
• D-Link DNS-340l: version 20260717 only
• D-Link DNS-345: version 20260717 only

Published 2026-08-31. Last modified 2026-08-31.