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CVE-2022-41040

97
FAUCET Score

CVE-2022-41040 is an Elevation of Privilege vulnerability affecting Microsoft Exchange Server, often exploited in conjunction with CVE-2022-41082 (ProxyNotShell). This high-severity flaw (CVSS 8.8) allows an authenticated attacker to gain elevated privileges remotely over the network with low attack complexity, leading to full compromise of confidentiality, integrity, and availability. It is actively exploited in the wild, including by ransomware groups, and has publicly available exploit modules in Metasploit. The vulnerability has garnered significant community attention and media coverage due to its critical nature and widespread impact.

Impacted Technologies

VendorProductVersion(s)CPE
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.96%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Sep 30, 2022
Metasploit: Microsoft Exchange ProxyNotShell RCE · Sep 28, 2022
This CVE's current EPSS score of 0.9996 is in the 100th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2013 Cumulative Update 23Fixed in: 15.00.1497.044
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 22Fixed in: 15.01.2375.037
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2019 Cumulative Update 11Fixed in: 15.02.0986.036
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2019 Cumulative Update 12Fixed in: 15.02.1118.020
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 23Fixed in: 15.01.2507.016
View patch

Vendor Advisories (1)

microsoft2022-Sep/CVE-2022-41040Critical

Microsoft Exchange Server Elevation of Privilege Vulnerability

Sep 13, 2022

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2022-41040
MitigationPatchVendor Advisory
kb.cert.org / vuls/id/915563
Third Party AdvisoryUS Government Resource
secpod.com / blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days
Third Party Advisory
msrc.microsoft.com / update-guide/vulnerability/CVE-2022-41040
PatchVendor Advisory