CVE-2021-40655

HIGH7.5

CISA KEV

Published 2021-09-24 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2021-40655 is a high-severity (CVSS 7.5) vulnerability in D-Link DIR-605 Router. CISA added it to the Known Exploited Vulnerabilities catalog on May 16, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 6, 2024. CISA does not currently list it as used in ransomware campaigns. D-Link has 26 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 26 known-exploited D-Link vulnerabilities →

Description

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

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-863CWE-863

CISA Known-Exploited Vulnerability

Product: D-Link — DIR-605 Router

Name: D-Link DIR-605 Router Information Disclosure Vulnerability

Date added: 2024-05-16 · Due: 2024-06-06

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.

References

View on NVD

More exploited D-Link vulnerabilities

Most recently added to CISA KEV

CVE-2025-29635
DIR-823X — D-Link DIR-823X Command Injection Vulnerability
added 2026-04-24
CVE-2022-37055
Routers — D-Link Routers Buffer Overflow Vulnerability
added 2025-12-08
CVE-2020-25078
DCS-2530L and DCS-2670L Devices — D-Link DCS-2530L and DCS-2670L Devices Unspecified Vulnerability
added 2025-08-05
CVE-2020-25079
DCS-2530L and DCS-2670L Devices — D-Link DCS-2530L and DCS-2670L Command Injection Vulnerability
added 2025-08-05
CVE-2022-40799
DNR-322L — D-Link DNR-322L Download of Code Without Integrity Check Vulnerability
added 2025-08-05
CVE-2024-0769
DIR-859 Router — D-Link DIR-859 Router Path Traversal Vulnerability
added 2025-06-25

View all →

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