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Background exploitation KEV catalog No authentication
CVE-2021-40655

D-Link DIR-605 Router Information Disclosure Vulnerability

An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page

CheckOps priority index
8.0/10 Patch within 24 h
Severity7.5
Probability8.7
Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 87.0% +0.4 pts in 7 days
CVSS 3.1 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:
Exploited for 901 days 16 May 2024
CISA due date 06 Jun 2024 for US federal agencies

Exploitation probability EPSS · FIRST

05010026 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

  • KEV catalog (CISA)16 May 2024
  • Exploited in EUVD (ENISA)16 May 2024
  • Used by ransomwareno
  • EPSS above 10 %87.0%
  • No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: This vulnerability affects legacy D-Link products. All associated hardware revisions have reached their end-of-life (EOL) or end-of-service (EOS) life cycle and should be retired and replaced per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

DIR-605 Router
Weaknesses (CWE)
CWE-863

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 87.0%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2025-29635D-Link DIR-823X Command Injection Vulnerability
    7.3 · Background exploitation
  • CVE-2022-37055D-Link Routers Buffer Overflow Vulnerability
    8.0 · Background exploitation
  • CVE-2022-40799D-Link DNR-322L Download of Code Without Integrity Check Vulnerability
    6.3 · Background exploitation
  • CVE-2020-25079D-Link DCS-2530L and DCS-2670L Command Injection Vulnerability
    6.9 · Background exploitation
  • CVE-2020-25078D-Link DCS-2530L and DCS-2670L Devices Unspecified Vulnerability
    8.3 · Background exploitation
  • CVE-2024-0769D-Link DIR-859 Router Path Traversal Vulnerability
    7.0 · Background exploitation

Are you affected?

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities