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Vulnerabilities

Vulnerability · CVE-2021-40655

D-Link DIR-605 Router Information Disclosure Vulnerability

Published Sep 24, 2021 · catalog updated Jun 16, 2026 · D-Link DIR-605 Router

Patch now

CVE-2021-40655 is in the CISA known-exploited catalog, due Jun 6, 2024. Confirm D-Link DIR-605 Router against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
86.66%
Remediation
Remediation guidance
Affected products
cpe dlink/dir-605l firmware · vendor D-Link DIR-605 Router

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe dlink/dir-605l firmware2.01mt
  • vendor D-Link DIR-605 Routerversion unspecified

How to fix CVE-2021-40655

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-40655 is in the CISA known-exploited catalog, due Jun 6, 2024. Confirm D-Link DIR-605 Router against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with dlink/dir-605l firmware 2.01mt. 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.

What should an analyst verify?

CWE-863: Incorrect Authorization. EPSS 86.66%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 24, 2021 · Catalog

    Detected

    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

  2. May 16, 2024 · CISA KEV

    Known exploited

    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.

  3. Jun 6, 2024 · CISA KEV

    Remediation due

    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.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2021-40655

    D-Link DIR-605 routers contain an information disclosure vulnerability that allows attackers to obtain a username and password by forging a post request to the /getcfg.php page.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-40655

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-40655

    30-day exploitation probability 86.7%

    first.org
  • NIST NVDVulnerability recordCVE-2021-40655

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-40655

    D-Link DIR-605 routers contain an information disclosure vulnerability that allows attackers to obtain a username and password by forging a post request to the /getcfg.php page.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.