CVE-2021-20090

Known Exploited Public Exploit

Description

A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.

References

Link	Tags
https://www.tenable.com/security/research/tra-2021-13	third party advisory exploit
https://www.kb.cert.org/vuls/id/914124	third party advisory us government resource
https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-20090?: CVE-2021-20090 has been scored as a critical severity vulnerability.
How to fix CVE-2021-20090?: To fix CVE-2021-20090, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20090 being actively exploited in the wild?: It is confirmed that CVE-2021-20090 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20090?: CVE-2021-20090 affects n/a Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3.

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Description

Category

CWE-22 – Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References

Frequently Asked Questions