All vulnerabilities
CVE-2021-20090

Arcadyan Buffalo Firmware Path Traversal Vulnerability

Arcadyan Buffalo Firmware
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 3 Nov 2021CISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 29 Apr 2021, 00:00 UTCPublishedCVE List
  2. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateBuffalo WSR-2533DHPL2 - Path TraversalNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

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.

Text from CVE List

Affected versions 1

  • Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3affected: WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24CVE List

References 5