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 Previdian
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).
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-20 17:34 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7782 records in the last 180 days details
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

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 0.56989
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True

References

Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website

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}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.