VULNERABILITY INTELLIGENCE

CVE-2021-20090

CVSS score9.8 CRITICAL

EPSS probability99.98%

CISA KEVKnown exploited vulnerability

Published2021-04-29

Last modified2026-06-17

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

Known Exploited Vulnerability

Arcadyan Buffalo Firmware Path Traversal Vulnerability

Vendor / product: Arcadyan / Buffalo Firmware

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.

Weakness classification

nvd@nist.gov: CWE-22
134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-22

Primary references

vulnreport@tenable.com — Third Party Advisory, US Government Resource
vulnreport@tenable.com — Exploit, Third Party Advisory
vulnreport@tenable.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource