Medium severity · published Feb 25, 2021
CVE-2021-24073
Skype for Business and Lync Spoofing Vulnerability
6.5
CVSS
1.8%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LS
Lync Server · Microsoft
2013 · source: NVD
SF
Skype For Business Server · Microsoft
2015 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-24073
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-24073
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24073
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