CVE-2025-10666: D-Link DIR-825 Firmware

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

A security flaw has been discovered in D-Link DIR-825 up to 2.10. Affected by this vulnerability is the function sub_4106d4 of the file apply.cgi. The manipulation of the argument countdown_time results in buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be exploited. This vulnerability only affects products that are no longer supported by the maintainer.

Affected products

• D-Link DIR-825 Firmware: up to and including 2.10

Published 2025-09-18. Last modified 2026-06-17.