CVE-2021-24073 json
Skype for Business and Lync Spoofing Vulnerability
published 5y ago modified 4mo ago also EUVD-2021-10989
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
Skype for Business and Lync Spoofing Vulnerability
Patch / fix
Is CVE-2021-24073 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:P/RL:O/RC:C |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Affected products
- Microsoft Skype for Business Server 2015 CU 8
- Microsoft Microsoft Lync Server 2013
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-24073
patch, vendor-advisory
Sources
- CVE List CVE-2021-24073
- NVD CVE-2021-24073
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.