CVE-2021-20090

CRITICAL KEV NUCLEI

Buffalo Wsr-2533dhpl2-bk Firmware < 1.02 - Path Traversal

Title source: rule

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.

Nuclei Templates (1)

Buffalo WSR-2533DHPL2 - Path Traversal

CRITICALby gy741

References (4)

[Third Party Advisory, US Government Resource] https://www.kb.cert.org/vuls/id/914124

[Exploit, Third Party Advisory] https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/

[Exploit, Third Party Advisory] https://www.tenable.com/security/research/tra-2021-13

[US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090

Scores

CVSS v3 9.8

EPSS 0.9437

EPSS Percentile 100.0%

Attack Vector NETWORK

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

Details

CISA KEV 2021-11-03

VulnCheck KEV 2021-08-06

InTheWild.io 2021-08-06

ENISA EUVD EUVD-2021-7547

CWE

CWE-22

Status published

Products (2)

buffalo/wsr-2533dhp3-bk_firmware < 1.24

buffalo/wsr-2533dhpl2-bk_firmware < 1.02

Published Apr 29, 2021

KEV Added Nov 03, 2021

Tracked Since Feb 18, 2026