CVE-2018-25115: D-Link Dir-110 Firmware

Critical severity, CVSS 9.8. EPSS: 10.1% chance of exploitation in the next 30 days.

Multiple D-Link DIR-series routers, including DIR-110, DIR-412, DIR-600, DIR-610, DIR-615, DIR-645, and DIR-815 firmware version 1.03, contain a vulnerability in the service.cgi endpoint that allows remote attackers to execute arbitrary system commands without authentication. The flaw stems from improper input handling in the EVENT=CHECKFW parameter, which is passed directly to the system shell without sanitization. A crafted HTTP POST request can inject commands that are executed with root privileges, resulting in full device compromise. These router models are no longer supported at the time of assignment and affected version ranges may vary. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-08-21 UTC.

Affected products

• D-Link Dir-110 Firmware: affected versions not specified
• D-Link Dir-412 Firmware: affected versions not specified
• D-Link DIR-600 Firmware: affected versions not specified
• D-Link DIR-610 Firmware: affected versions not specified
• D-Link Dir-615 Firmware: affected versions not specified
• D-Link DIR-645 Firmware: affected versions not specified
• D-Link Dir-815 Firmware: version 1.03 only

Published 2025-08-27. Last modified 2026-06-17.