Hackers actively exploit critical RCE flaw in legacy D-Link DSL routers
Attackers are exploiting a critical flaw (CVE-2026-0625) in old D-Link DSL routers that allows remote command execution. Threat actors are actively exploiting a critical RCE flaw, tracked as CVE-2026-0625 (CVSS score of 9.3), in legacy D-Link DSL routers. The vulnerability is an improper neutralization of special elements used in an OS Command (‘OS Command Injection’), […]
Threat actors are actively exploiting a critical RCE flaw, tracked as CVE-2026-0625 (CVSS score of 9.3), in legacy D-Link DSL routers. The vulnerability is an improper neutralization of special elements used in an OS Command (‘OS Command Injection’), and is caused by command injection in the dnscfg.cgi endpoint due to improper input sanitization.
“Multiple D-Link DSL gateway devices contain a command injection vulnerability in the dnscfg.cgi endpoint due to improper sanitization of user-supplied DNS configuration parameters. An unauthenticated remote attacker can inject and execute arbitrary shell commands, resulting in remote code execution.” reported cybersecurity firm VulnCheck. “The affected endpoint is also associated with unauthenticated DNS modification (“DNSChanger”) behavior documented by D-Link, which reported active exploitation campaigns targeting firmware variants of the DSL-2740R, DSL-2640B, DSL-2780B, and DSL-526B models from 2016 through 2019.”
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