CVE-2022-41040
HighExploitedPublic exploitMicrosoft Exchange Server Elevation of Privilege Vulnerability
Published Nov 9, 2022 · Updated Oct 21, 2025
Key Facts
Patch immediately- CVE-2022-41040 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 22 and 3 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 29, 2022 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.044, Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.037, Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.016.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-41040 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Sep 30, 2022 | Oct 21, 2022 | Known |
| Industry KEV feed | Sep 29, 2022 | Oct 21, 2022 | Known |
| CIRCL KEV | Sep 30, 2022 | Oct 21, 2022 | Known |
| ENISA EUVD | Sep 30, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Exchange ServerMicrosoft | 2013-cumulative_update_23, 2016-cumulative_update_22, 2016-cumulative_update_23, 2019-cumulative_update_11, 2019-cumulative_update_12 | n/a |
| Microsoft Exchange Server 2013 Cumulative Update 23 | >= 15.00.0 | 15.00.1497.044 |
| Microsoft Exchange Server 2016 Cumulative Update 22 | >= 15.0.0 | 15.01.2375.037 |
| Microsoft Exchange Server 2016 Cumulative Update 23 | >= 15.01.0 | 15.01.2507.016 |
| Microsoft Exchange Server 2019 Cumulative Update 11 | >= 15.02.0 | 15.02.0986.036 |
Patched Releases
Microsoft Exchange Server 2013 Cumulative Update 23
15.00.1497.044
Microsoft Exchange Server 2016 Cumulative Update 22
15.01.2375.037
Microsoft Exchange Server 2016 Cumulative Update 23
15.01.2507.016
Microsoft Exchange Server 2019 Cumulative Update 11
15.02.0986.036
Microsoft Exchange Server 2019 Cumulative Update 12
15.02.1118.020
Timeline
Added to Industry KEV feed
Sep 29, 2022
Added to CISA KEV
Sep 30, 2022
Added to CIRCL KEV
Sep 30, 2022
Added to ENISA EUVD
Sep 30, 2022
Publicly disclosed
Nov 9, 2022
Last updated
Oct 21, 2025
Weakness Type
- CWE-918 Server-Side Request Forgery (SSRF)
References
- advisoryhttps://blog.qualys.com/vulnerabilities-threat-research/2022/11/08/november-2022-patch-tuesday
- advisoryhttps://blog.talosintelligence.com/microsoft-patch-tuesday-for-november-2022/
- advisoryhttps://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/
- advisoryhttps://techcommunity.microsoft.com/t5/exchange-team-blog/released-november-2022-exchange-server-security-updates/ba-p/3669045
- advisoryhttps://www.bleepingcomputer.com/news/microsoft/microsoft-november-2022-patch-tuesday-fixes-6-exploited-zero-days-68-flaws/
FAQ
Common Questions.
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected: Exchange Server (Microsoft) versions 2013-cumulative_update_23, 2016-cumulative_update_22, 2016-cumulative_update_23, 2019-cumulative_update_11, 2019-cumulative_update_12; Microsoft Exchange Server 2013 Cumulative Update 23 versions >= 15.00.0; 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 CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 29, 2022 and is known to be used in ransomware campaigns.
Yes. It was added on Sep 30, 2022 with a federal remediation due date of Oct 21, 2022.
Public exploit code is available.
Fixed versions are available, including Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.044, Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.037, Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.016.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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