CVE-2026-0625 (GCVE-0-2026-0625)

Vulnerability from cvelistv5 – Published: 2026-01-05 21:14 – Updated: 2026-05-25 23:41 Unsupported When Assigned X_Known Exploited Vulnerability
VLAI KEVintel KEV
Title
D-Link DSL/DIR/DNS Authentication Bypass via DNS Configuration Endpoint
Summary
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).
Severity
9.3 (Critical)
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
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Credits
The Shadowserver Foundation VulnCheck
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: b03475c1-ecde-4617-bb6f-6410271cf7de

Vulnerability ID: CVE-2026-0625

Status: Confirmed

Status Updated: 2026-06-01 10:47 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: D-Link DSL/DIR/DNS Authentication Bypass via DNS Configuration Endpoint | Affected: D-Link / DSL-2640B, DSL-2740R, DSL-2780B, DSL-526B, DSL-2640T, DSL-500, DSL-500G, DSL-502G, DIR-905L, DIR-600, DIR-608, DIR-610, DIR-611, DIR-615, DNS-320, DNS-325, DNS-345 | CVSS: 9.3 (CRITICAL) | EPSS: 0.00964 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title D-Link DSL/DIR/DNS Authentication Bypass via DNS Configuration Endpoint
Vendor D-Link
Product DSL-2640B, DSL-2740R, DSL-2780B, DSL-526B, DSL-2640T, DSL-500, DSL-500G, DSL-502G, DIR-905L, DIR-600, DIR-608, DIR-610, DIR-611, DIR-615, DNS-320, DNS-325, DNS-345
Added Date 2026-06-01T10:47:41.999Z
Cvss Score 9.3
Epss Score 0.00964
Cvss Severity CRITICAL
Epss Percentile 0.57021
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-19 12:45 UTC | Updated: 2026-06-19 12:45 UTC
Show details on NVD website
To clipboard 

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By directly requesting this endpoint, an attacker can modify the device\\u2019s DNS settings without valid credentials, enabling DNS hijacking (\\u201cDNSChanger\\u201d) 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.\\u00a0Exploitation evidence was observed by the Shadowserver Foundation on 2025-11-27 (UTC).\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"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\\u2019s DNS settings without valid credentials, enabling DNS hijacking (\\u201cDNSChanger\\u201d) 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.\u0026nbsp;Exploitation evidence was observed by the Shadowserver Foundation on 2025-11-27 (UTC).\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306 Missing Authentication for Critical Function\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:dlink:dsl-2640b_firmware:eu_4.01b:*:*:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:dlink:dsl-2740r_firmware:uk_1.01:*:*:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:h:dlink:dsl-2740r:-:*:*:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:h:dlink:dsl-2640t:-:*:*:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:dlink:dsl-2640t_firmware:-:*:*:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-05-25T23:41:34.467Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-0625\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-25T23:41:34.467Z\", \"dateReserved\": \"2026-01-05T20:59:29.705Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-01-05T21:14:48.992Z\", \"assignerShortName\": \"VulnCheck\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.