Is CVE-2022-41040 actively exploited?

Yes. KEV Intelligence has observed exploitation attempts targeting this CVE. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence sensors have observed 324 exploitation attempts, 277 unique attacker IPs, and 1 country targeting CVE-2022-41040. First observed Jul 01, 2026; last observed Aug 17, 2026.

Which versions are affected?

CVE-2022-41040 affects Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 and 4 other products. KEV Intelligence lists 5 version rows; examples include 15.00.0 to < 15.00.1497.044, 15.0.0 to < 15.01.2375.037, and 15.02.0 to < 15.02.0986.036.

How should organizations remediate it?

Prioritize immediate patching and validate internet-facing exposure. Monitor for matching exploitation attempts in your environment.

Yes. CVE-2022-41040 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

CVE-2022-41040 Exploitation Observed — Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 22, Microsoft Exchange Server 2019 Cumulative Update 11, Microsoft Exchange Server 2019 Cumulative Update 12, Microsoft Exchange Server 2016 Cumulative Update 23

Q: What is CVE-2022-41040?

CVE-2022-41040 is Microsoft Exchange Server Elevation of Privilege Vulnerability.

Q: How should organizations remediate it?

Prioritize immediate patching and validate internet-facing exposure. Monitor for matching exploitation attempts in your environment.

Q: Is it in CISA KEV?

Yes. CVE-2022-41040 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2022-41040 is Microsoft Exchange Server Elevation of Privilege Vulnerability.

Is it exploited?

Yes. KEV Intelligence sensors observed exploitation attempts with confirmed confidence.

Who is affected?

Microsoft / Microsoft Exchange Server 2013 Cumulative Update 23 affected before 15.00.1497.044.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Microsoft Exchange Server Elevation of Privilege Vulnerability

Vendor Product Affected Status

Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 Before 15.00.1497.044 Affected

Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 Before 15.01.2375.037 Affected

Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 Before 15.02.0986.036 Affected

Microsoft Microsoft Exchange Server 2019 Cumulative Update 12 Before 15.02.1118.020 Affected

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 Before 15.01.2507.016 Affected

View vendor advisory

Published: 03 Oct 2022
Exploitation Reported: 30 Sep 2022
Attack vector: Remote
Complexity: Low
Privileges: Low
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2022-41040
Microsoft Exchange Server Elevation of Privilege Vulnerability msrc.microsoft.com · Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 30 Sep 2022

Independent exploitation attestation added to the KEV Intelligence record.

Active exploitation observed

KEV Intelligence sensor

First observed 01 Jul 2026

First-party sensor telemetry confirms matching exploitation attempts.

Used in malware

CISA

Recorded 30 Sep 2022

Malware families have been linked to exploitation of this CVE.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

Learn about Pro API access

Source	Added
CISA First	2022-09-30 00:00 UTC
KEV Intelligence	2026-07-30 13:51 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.

324

Attempts observed

277

Unique attacker IPs

1

Attacker countries

US

33

Sensors observed

Exploitation attempts over the last 51 days

Daily events observed by KEV Intelligence sensors

Updated 19 Aug 2026

0

13

0

77

0

16

0

17

3

0

20

0

20

0

22

0

23

0

21

0

24

0

26

0

12

11

0

25

0

23

0

23

0

5

23

0

21

16

26

0

26

0

10

25

0

28

0

30 Jun 11 Jul 22 Jul 2 Aug 19 Aug

First observed 01 Jul 2026 · Last observed 17 Aug 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

Request telemetry access

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 1
User-Agents: 1

Raw values available in Pro and Enterprise.

Scanner coverage

Metasploit template detected 28 Apr 2025.

View Metasploit template

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/exchange_proxynotshell_rce.rb	28 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.8 High

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

EPSS

100.0%

Weaknesses

Server-Side Request Forgery (SSRF) CWE-918

Timeline

From disclosure to observed exploitation

01 Jul 2026
Observed by KEV Intelligence sensors

Evidence-backed exploitation signal
01 Jul 2026
Indicators of compromise added (437)

Indicators of compromise recorded
28 Apr 2025
Metasploit module available

Exploit module available
03 Oct 2022
CVE published

Vulnerability disclosed publicly
30 Sep 2022
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
30 Sep 2022
First public exploitation report

Exploit observed in malware
19 Sep 2022
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2022-41040

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2022-41040",
  "confidence": "Confirmed",
  "cvss_score": 8.8,
  "cvss_estimated": false,
  "epss_score": 0.99956,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 324, "sensors": 33 }
}

CVE-2022-41040