CVE-2021-40655 D-Link DIR-605 Router: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Jun 6, 2024
What to do
- Install D-Link's security update for DIR-605 Router. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- D-Link DIR-605 Router Information Disclosure Vulnerability
- Product
- D-Link DIR-605 Router
- CISA 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.
- Type of flaw
- Login or permission bypass (CWE-863)
- Confirmed exploited
- May 16, 2024
- US federal patch deadline
- Jun 6, 2024
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Answering about CVE-2021-40655 ·
Questions about CVE-2021-40655
Is CVE-2021-40655 being exploited?
Yes. CISA added CVE-2021-40655 to its Known Exploited Vulnerabilities catalog on May 16, 2024, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-40655?
Install D-Link's security update for DIR-605 Router. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2021-40655?
Only if you use D-Link DIR-605 Router. This one is aimed at devices or apps of the kind people own.