// For flags

CVE-2021-26421

Skype for Business and Lync Spoofing Vulnerability

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Skype for Business and Lync Spoofing Vulnerability

Una vulnerabilidad de Suplantación de Identidad de Skype Business y Lync

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-29 CVE Reserved
  • 2021-05-11 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-10-31 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
 Lync Server
Search vendor "Microsoft" for product "Lync Server"
 2013
Search vendor "Microsoft" for product "Lync Server" and version "2013"
cumulative_update_10
Affected
Microsoft
Search vendor "Microsoft"
 Skype For Business Server
Search vendor "Microsoft" for product "Skype For Business Server"
 2015
Search vendor "Microsoft" for product "Skype For Business Server" and version "2015"
cumulative_update_11
Affected