CVE-2022-21855 in the critical feed json
Microsoft Exchange Server Remote Code Execution Vulnerability
published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27011
- cvss
- 9.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
Patch / fix
- Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.028
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.021
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0922.020
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.018
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.015
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.7 | AV:A/AC:L/Au:S/C:C/I:C/A:C |
Affected products
- Microsoft Microsoft Exchange Server 2013 Cumulative Update 23
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 21
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 10
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 22
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 11
Classification
- Technology feeds
References
Sources
- CVE List CVE-2022-21855
- NVD CVE-2022-21855
Fencer Vulns 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.