Vulnerability Database

309,961

Total vulnerabilities in the database

CVE-2021-26421

Skype for Business and Lync Spoofing Vulnerability

  • Published: May 11, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-26421
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N

CVSS v2:

  • Severity: Medium
  • Score: 5.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:N

No CWE or OWASP classifications available.

Software From Fixed in
microsoft / skype_for_business_server 2015-cumulative_update_11 2015-cumulative_update_11.x
microsoft / lync_server 2013-cumulative_update_10 2013-cumulative_update_10.x