Risk Letters

Exploited vulnerability

CVE-2021-20090

TLP:CLEAR

Arcadyan Buffalo Firmware Path Traversal Vulnerability

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.

Facts

  • Vendor: Arcadyan
  • Product: Buffalo Firmware
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 100 %
  • On CISA's Known Exploited Vulnerabilities list since: 3 November 2021
  • First known exploitation: 3 November 2021
  • CISA's deadline for US federal agencies: 17 November 2021
  • Weakness: CWE-22
  • First seen by Risk Letters: 3 November 2021

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD