CVE-2026-0625
Severity CVSS v4.0:
CRITICAL
Type:
CWE-306
Missing Authentication for Critical Function
Publication date:
05/01/2026
Last modified:
08/01/2026
Description
Multiple D-Link DSL/DIR/DNS devices contain an authentication bypass and improper access control vulnerability in the dnscfg.cgi endpoint that allows an unauthenticated attacker to access DNS configuration functionality. By directly requesting this endpoint, an attacker can modify the device’s DNS settings without valid credentials, enabling DNS hijacking (“DNSChanger”) attacks that redirect user traffic to attacker-controlled infrastructure. In 2019, D-Link reported that this behavior was leveraged by the "GhostDNS" malware ecosystem targeting consumer and carrier routers. All impacted products were subsequently designated end-of-life/end-of-service, and no longer receive security updates. Exploitation evidence was observed by the Shadowserver Foundation on 2025-11-27 (UTC).
Impact
Base Score 4.0
9.30
Severity 4.0
CRITICAL
References to Advisories, Solutions, and Tools
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10068
- https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10118
- https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10488
- https://www.vulncheck.com/advisories/dlink-dsl-command-injection-via-dns-configuration-endpoint