D-Link CVE-2026-0625
CRITICALSeverity by source
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:A/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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:A/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
Lifecycle Timeline
4DescriptionCVE.org
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).
AnalysisAI
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.
Technical ContextAI
Classified as CWE-306 (Missing Authentication for Critical Function). Affects the dnscfg.cgi component of dnscfg.cgi 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 lever
Affected ProductsAI
Product: dnscfg.cgi endpoint. Component: dnscfg.cgi.
RemediationAI
Monitor vendor advisories for a patch.
The D-Link DIR-645 Wired/Wireless Router Rev. Rated high severity (CVSS 8.8), this vulnerability is no authentication re
The ping tool in multiple D-Link and TRENDnet devices allow remote attackers to execute arbitrary code via the ping_addr
D-Link DIR-820L 1.05B03 was discovered to contain remote command execution (RCE) vulnerability via HTTP POST to get set
Stack-based buffer overflow in the do_hnap function in www/my_cgi.cgi in D-Link DSP-W215 (Rev. Rated critical severity (
Multiple cross-site request forgery (CSRF) vulnerabilities in D-Link DIR-600 router (rev. Rated high severity (CVSS 8.0)
Unrestricted file upload vulnerability in D-Link DCS-931L with firmware 1.04 and earlier allows remote authenticated use
D-Link DIR-600 Rev Bx devices with v2.x firmware allow remote attackers to read passwords via a model/__show_info.php?RE
Multiple cross-site scripting (XSS) vulnerabilities in D-Link DIR-645 Router (Rev. Rated medium severity (CVSS 4.3), thi
Directory traversal vulnerability in D-Link DVG-N5402SP with firmware W1000CN-00, W1000CN-03, or W2000EN-00 allows remot
A vulnerability in the D-Link DIR-859 router with firmware version A3 1.05 and earlier permits unauthorized individuals
The web interface of multiple D-Link routers, including DIR-600 rev B (≤2.14b01) and DIR-300 rev B (≤2.13), contains an
An OS command injection vulnerability exists in various legacy D-Link routers-including DIR-300 rev B and DIR-600 (firmw
Same technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today