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Total 2 CVE
CVE Vendors Products Updated CVSS v3.1
CVE-2026-0625 1 D-link 4 Dsl-2640b, Dsl-2740r, Dsl-2780b and 1 more 2026-01-08 N/A
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).
CVE-2020-9544 1 D-link 2 Dsl-2640b, Dsl-2640b Firmware 2024-11-21 7.5 High
An issue was discovered on D-Link DSL-2640B E1 EU_1.01 devices. The administrative interface doesn't perform authentication checks for a firmware-update POST request. Any attacker that can access the administrative interface can install firmware of their choice.