CVE-2022-23277Exchange Server Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
Published Mar 9, 2022 · Updated Jul 8, 2025
Key Facts
Patch immediately- CVE-2022-23277 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Exchange Server (Microsoft), Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 21 and 3 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 41% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.033, Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.027, Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.024.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
41%
Higher than 98.6% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
70/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryMicrosoft Exchange Server Remote Code Execution Vulnerability
- advisoryhttp://blog.talosintelligence.com/2022/03/microsoft-patch-tuesday-for-march-2022.html
- advisoryhttps://blog.qualys.com/vulnerabilities-threat-research/2022/03/08/march-2022-patch-tuesday
- advisoryhttps://cybersafenv.org/2022/03/08/microsoft-march-2022-patch-tuesday-tue-mar-8th/
- advisoryhttps://helpx.adobe.com/security/products/after_effects/apsb22-17.html
- advisoryhttps://isc.sans.edu/diary/rss/28418
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Exchange ServerMicrosoft | 2013-cumulative_update_23, 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, 2019-cumulative_update_11 | n/a |
| Microsoft Exchange Server 2013 Cumulative Update 23 | >= 15.00.0 | 15.00.1497.033 |
| Microsoft Exchange Server 2016 Cumulative Update 21 | >= 15.01.0 | 15.01.2308.027 |
| Microsoft Exchange Server 2016 Cumulative Update 22 | >= 15.0.0 | 15.01.2375.024 |
| Microsoft Exchange Server 2019 Cumulative Update 10 | >= 15.02.0 | 15.02.0922.027 |
Patched Releases
Microsoft Exchange Server 2013 Cumulative Update 23
15.00.1497.033
Microsoft Exchange Server 2016 Cumulative Update 21
15.01.2308.027
Microsoft Exchange Server 2016 Cumulative Update 22
15.01.2375.024
Microsoft Exchange Server 2019 Cumulative Update 10
15.02.0922.027
Microsoft Exchange Server 2019 Cumulative Update 11
15.02.0986.022
Timeline
Publicly disclosed
Mar 9, 2022
Last updated
Jul 8, 2025
References
- advisoryMicrosoft Exchange Server Remote Code Execution Vulnerability
- advisoryblog.talosintelligence.com · microsoft-patch-tuesday-for-march-2022.html
- advisoryblog.qualys.com · march-2022-patch-tuesday
- advisorycybersafenv.org · microsoft-march-2022-patch-tuesday-tue-mar-8th
- advisoryhelpx.adobe.com · apsb22-17.html
FAQ
Common Questions.
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected: Exchange Server (Microsoft) versions 2013-cumulative_update_23, 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, 2019-cumulative_update_11; Microsoft Exchange Server 2013 Cumulative Update 23 versions >= 15.00.0; Microsoft Exchange Server 2016 Cumulative Update 21 versions >= 15.01.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.033, Microsoft Exchange Server 2016 Cumulative Update 21 15.01.2308.027, Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.024.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2022-23277 On Your Attack Surface?
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