CVE-2022-24463Exchange Server Vulnerability
Microsoft Exchange Server Spoofing Vulnerability
Published Mar 9, 2022 · Updated Jul 8, 2025
Key Facts
Patch immediately- CVE-2022-24463 is a medium-severity vulnerability (CVSS 6.5 v3.1) affecting Exchange Server (Microsoft), Microsoft Exchange Server 2016 Cumulative Update 21, Microsoft Exchange Server 2016 Cumulative Update 22 and 2 more products.
- It is exploited in the wild, listed in Industry KEV feed since May 6, 2024. No public exploit code is known.
- EPSS estimates a 32% probability of exploitation in the next 30 days.
- Fixed versions are available, including 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.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
32%
Higher than 98.3% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
56/100
Publication score, see How it works
Exploitation Verdict
KEV listed
May 6, 2024
789 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Description
Microsoft Exchange Server Spoofing Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 6, 2024 | n/a | Not reported |
Affected Products
8 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Exchange ServerMicrosoft | 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, 2019-cumulative_update_11 | n/a |
| 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 |
| Microsoft Exchange Server 2019 Cumulative Update 11 | >= 15.02.0 | 15.02.0986.022 |
Patched Releases
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
Added to Industry KEV feed
May 6, 2024
Last updated
Jul 8, 2025
References
FAQ
Common Questions.
Microsoft Exchange Server Spoofing Vulnerability
Affected: Exchange Server (Microsoft) versions 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, 2019-cumulative_update_11; Microsoft Exchange Server 2016 Cumulative Update 21 versions >= 15.01.0; Microsoft Exchange Server 2016 Cumulative Update 22 versions >= 15.0.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 6, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including 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.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2022-24463 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
Request A Demo