CVE-2025-5620: D-Link Dir-816 Firmware

Critical severity, CVSS 9.8. EPSS: 7.7% chance of exploitation in the next 30 days.

A vulnerability, which was classified as critical, was found in D-Link DIR-816 1.10CNB05. Affected is the function setipsec_config of the file /goform/setipsec_config. The manipulation of the argument localIP/remoteIP leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Affected products

• D-Link Dir-816 Firmware: version 1.10cnb05 only

Published 2025-06-05. Last modified 2026-06-17.