CVE-2021-20090CISA KEVEPSS p100.0%

CVE-2021-20090Arcadyan Buffalo Firmware Path Traversal Vulnerability

Arcadyan / Buffalo Firmware

Description

Arcadyan Buffalo firmware contains a path traversal vulnerability that could allow unauthenticated, remote attackers to bypass authentication and access sensitive information. This vulnerability affects multiple routers across several different vendors.

Scoring

EPSS99.98% probability of exploitation · percentile 100.0% · 2026-06-15T12:03:41Z

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryArcadyan Buffalo Firmware Path Traversal Vulnerabilitykev-cve-2021-200900%live

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.