New D-Link flaw in legacy DSL routers actively exploited in attacks
Threat actors are exploiting a recently discovered command injection vulnerability that affects multiple D-Link DSL gateway routers that went out of support years ago. The vulnerability is now tracked as CVE-2026-0625 and affects the dnscfg.cgi endpoint due to improper input sanitization in a CGI library. An unauthenticated attacker could leverage this to execute remote commands via DNS configuration parameters.
Vulnerability intelligence company VulnCheck reported the problem to D-Link on December 15, after The Shadowserver Foundation observed a command injection exploitation attempt on one of its honeypots. VulnCheck told BleepingComputer that the technique captured by Shadowserver does not appear to have been publicly documented.









