November 15, 2026

CVE Watchtower

CVE-2026-129444D-Link DSL-6740C Use of Hard-coded Credentials

NVD

Vulnerability Summary

A vulnerability was identified in D-Link DSL-6740C 20131126. This affects an unknown function of the file /etc/templates/ftpd/ftpd_conf.php of the component FTP Daemon. Such manipulation leads to hard-coded credentials. The attack can be executed remotely. The exploit is publicly available and might be used.
Severity Level
CRITICAL(10.0)
Published Date
Nov 15, 2026
Last Modified
Nov 15, 2026
Exploitation Status
Public exploit available
Root Weakness (CWE)
CWE-798: Use of Hard-coded Credentials β†—
The software contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data.
CWE-259 β†—
See the MITRE CWE entry for the full definition of this weakness.
CVSS v4.0 Base Metrics — Score 10.0 (CRITICAL)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High
Show CVSS v3.x metrics (score 10.0)
CVSS v3.1 Base Metrics — Score 10.0 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • D-Link DSL-6740C 20131126
Patched Versions
No patched version published yet
Until a fix ships, reduce exposure:
  • Restrict access to the affected service or interface to trusted networks.
  • Disable the affected feature if you do not need it.
  • Watch the vendor advisory for a firmware or software update.

What to do

Prioritize this fix. Exploit code is public, so attacks can follow quickly.

  1. Check whether you run D-Link DSL-6740C and which version.
  2. No patched version is listed yet. Limit access to the affected service to trusted networks, and disable the feature if you can.
  3. Subscribe to the vendor advisory so you learn when a fix ships.
  4. Review logs and exposed services for signs of earlier compromise.

Timeline

  • Nov 15, 2026Published
  • Nov 15, 2026Record last modified
  • Nov 15, 2026PoC status changed: POC to UNKNOWN
  • Nov 15, 2026CVSS score changed: 10.0 to 9.3
  • Nov 15, 2026PoC status changed: POC to UNKNOWN
  • Nov 15, 2026CVSS score changed: 10.0 to 9.3

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 15, 2026 11:11 UTC