CVE-2021-20090

CRITICALCISA KEV

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/29/2021

Last Modified11/3/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorArcadyan

ProductBuffalo Firmware

Vulnerability NameArcadyan Buffalo Firmware Path Traversal Vulnerability

KEV Date Added2021-11-03

Remediation Due Date2021-11-17

Ransomware UseUnknown

Affected Products

buffalo:wsr-2533dhp3-bkbuffalo:wsr-2533dhp3-bk_firmwarebuffalo:wsr-2533dhpl2-bkbuffalo:wsr-2533dhpl2-bk_firmware

Weaknesses (CWE)

CWE-22CWE-22

References

https://www.kb.cert.org/vuls/id/914124(vulnreport@tenable.com)

https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/(vulnreport@tenable.com)

https://www.tenable.com/security/research/tra-2021-13(vulnreport@tenable.com)

https://www.kb.cert.org/vuls/id/914124(af854a3a-2127-422b-91ae-364da2661108)

https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/(af854a3a-2127-422b-91ae-364da2661108)

https://www.tenable.com/security/research/tra-2021-13(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.