Risk Letters

Exploited vulnerability

CVE-2021-27561

TLP:CLEAR

Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability

Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.

Facts

  • Vendor: Yealink
  • Product: Device Management
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 82.9 %
  • 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-78
  • 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