CVE-2026-0625
D-Link · published 2026-01-05
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by VulnCheck via the CVE Program.
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).
Filed by VulnCheck; not a statement by D-Link.
Status at the source
- NVD status: Deferred — NVD has not analysed this CVE.
- CVE tag (from VulnCheck): unsupported-when-assigned
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| D-Link | DSL-2640B | 0: affected |
| D-Link | DSL-2740R | 0: affected |
| D-Link | DSL-2780B | 0: affected |
| D-Link | DSL-526B | 0: affected |
| D-Link | DSL-2640T | 0: affected |
| D-Link | DSL-500 | 0: affected |
| D-Link | DSL-500G | 0: affected |
| D-Link | DSL-502G | 0: affected |
| D-Link | DIR-905L | 0: affected |
| D-Link | DIR-600 | 0: affected |
| D-Link | DIR-608 | 0: affected |
| D-Link | DIR-610 | 0: affected |
| D-Link | DIR-611 | 0: affected |
| D-Link | DIR-615 | 0: affected |
| D-Link | DNS-320 | 0: affected |
| D-Link | DNS-325 | 0: affected |
| D-Link | DNS-345 | 0: affected |
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 9.3 CRITICAL — as published by VulnCheck (Secondary)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: yes · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- 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
Source dates: published 2026-01-05, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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