D-Link

CVE-2026-0625: D-Link DSL/DIR/DNS Authentication Bypass via DNS Configuration Endpoint

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 5 Jan 2026. It cites 3 public reports, the first from 5 Jan 2026.

How likely is exploitation in the next 30 days?

EPSS score, percentile 61.9 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

9.3 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

D-Link Systems, Inc. recommends retiring these products and replacing them with products that receive firmware updates.Solution from the CVE record.

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (3)

Which versions are affected?

Affected

unspecified
unspecified
unspecified
unspecified
unspecified
unspecified

and 11 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

D-Link DSL/DIR/DNS Authentication Bypass via DNS Configuration Endpoint

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).

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

supportannouncement.us.dlink.com (Vendor advisory, Mitigation)
supportannouncement.us.dlink.com (Vendor advisory)
supportannouncement.us.dlink.com (Vendor advisory)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.