D-Link DIR-605 Router Information Disclosure Vulnerability
n/a — n/a
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
7.5
86.7%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- Sep 24, 2021
- Modified
- Oct 21, 2025
- Added to KEV
- May 16, 2024
- Federal patch due
- Jun 6, 2024
CISA required action
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.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2021-40655, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2021-40655 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-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
How severe is CVE-2021-40655?
CVE-2021-40655 has a CVSS base score of 7.5 out of 10 (CVSS 3.1).
Is CVE-2021-40655 actively exploited in the wild?
Yes. CVE-2021-40655 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 16, 2024, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2021-40655?
86.7% - meaning FIRST.org's EPSS model estimates a 86.7% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2021-40655?
Yes - a public Nuclei template referencing CVE-2021-40655 exist in public repositories we checked.
What type of vulnerability is CVE-2021-40655?
CVE-2021-40655 is classified under CWE-863 (CWE-863 Incorrect Authorization).
Cross-checked against
Impactr finds and proves whether CVE-2021-40655 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.