# CVE-2021-40655: D-Link DIR-605 Router Information Disclosure Vulnerability

Source: https://junglewise.ai/threats/cve-2021-40655-d-link-dir-605-router-information-disclosure-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-05-16. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2021-40655 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2024-05-16

D-Link DIR-605 routers contain an information disclosure vulnerability due to incorrect authorization. An attacker can obtain the device's username and password by sending a forged POST request to the /getcfg.php page.

Vendors: [D-Link](https://junglewise.ai/threats/vendors/d-link).

## Quick answers

**Is CVE-2021-40655 exploited in the wild?** Yes. CVE-2021-40655 is known to be exploited in the wild, first recorded on 16 May 2024. Treat it as urgent.

**How severe is CVE-2021-40655?** Critical severity, with a CVSS score of 7.5, published 16 May 2024.

**Which products and versions are affected?** D-Link DIR-605 B2 Firmware 2.01MT; D-Link DIR-605L B2 Firmware 2.01MT.

**Is there a fix for CVE-2021-40655?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-40655 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2021-40655?** Check whether you run D-Link DIR-605 Router. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- D-Link DIR-605 B2 Firmware 2.01MT
- D-Link DIR-605L B2 Firmware 2.01MT

## Timeline

- 2021-09-24: disclosed: NVD Published Date
- 2024-05-16: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2024-05-16: exploited: CISA confirmed exploitation in the wild