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CVE-2022-41040

Microsoft Exchange Server Elevation of Privilege Vulnerability

HIGH
8.8
CVSS Score
Published: October 3, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:02 AM UTC
1 product affected across 1 vendorExchange Server

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Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 100%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score100.0%

EPSS (Exploit Prediction Scoring System) estimates a 100.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Microsoft Exchange Server allows for server-side request forgery. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Known
Added to KEV
Sep 30, 2022
Remediation Due
Oct 21, 2022
1471 days overdue
Notes
https://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/
https://nvd.nist.gov/vuln/detail/CVE-2022-41040

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Exchange Server· Microsoft
95%
15.0.0 ≤ v < 15.01.2375.03715.00.0 ≤ v < 15.00.1497.04415.01.0 ≤ v < 15.01.2507.01615.02.0 ≤ v < 15.02.0986.03615.02.0 ≤ v < 15.02.1118.02015.0.015.00.015.01.015.02.02013 cumulative_update_232016 cumulative_update_222016 cumulative_update_232019 cumulative_update_112019 cumulative_update_12
Affected range stops below 15.00.1497.044, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.01.2375.037, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.01.2507.016, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.0986.036, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1118.020, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040
ExploitThird Party AdvisoryVDB Entry
Source: af854a3a-2127-422b-91ae-364da2661108
http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html
MitigationPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040
Third Party AdvisoryUS Government Resource
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.kb.cert.org/vuls/id/915563
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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