CVE-2022-41040

Name: CVE-2022-41040
Creator: NVD / NIST
Published: 2022-10-03T01:15:08.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 99.94%

Last modified Jun 17, 2026

CVE-2022-41040 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Microsoft Exchange Server Elevation of Privilege Vulnerability. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.94% chance of exploitation in the next 30 days.

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.94%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Oct 21, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2013	Cumulative Update 23
Microsoft	Exchange Server	2016	Cumulative Update 22
Microsoft	Exchange Server	2019	Cumulative Update 11

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040Patch, Vendor Advisory
http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040Mitigation, Patch, Vendor Advisory
https://www.kb.cert.org/vuls/id/915563Third Party Advisory, US Government Resource
https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040US Government Resource

Timeline

Published: Oct 3, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-41040?

Microsoft Exchange Server Elevation of Privilege Vulnerability

How severe is CVE-2022-41040?

CVE-2022-41040 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 99.94% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2022-41040?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-41040?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST