Is CVE-2021-40655 actively exploited?

Yes. CVE-2021-40655 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-40655 be exploited remotely?

The attack vector of CVE-2021-40655 has not been classified yet.

What is the CVSS score of CVE-2021-40655?

CVE-2021-40655 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-40655

HIGHCISA KEVIN THE WILD

CVE-2021-40655

Published: May 16, 2024

EPSS:92.61%probability of exploitation in 30 daysPercentile:99.7th

Official Description

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.

NVD Source

CISA KEV Advisory

D-Link DIR-605 Router Information Disclosure Vulnerability

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.

Added to KEV: 2024-05-16Federal patch deadline: 2024-06-06

Required Action (CISA)

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.

Risk Analysis

This information disclosure vulnerability in D-Link DIR-605 routers allows attackers to obtain a username and password by forging a post request to the /getcfg.php page. With an EPSS score of 0.92608 and its inclusion in CISA's KEV, this flaw is highly likely to be exploited and poses a significant risk to affected routers.

This vulnerability is actively exploited in the wild and is listed in CISA's KEV, confirming its active use by threat actors. The ability to obtain credentials remotely makes this a severe threat.

Recommended Action

Users of D-Link DIR-605 routers should update their firmware to the latest secure version or consider replacing the device if updates are no longer available. Change default credentials and use strong, unique passwords.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-40655 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-40655 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.