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High 8.8Known exploited (CISA KEV)Published Oct 3, 2022
CVE-2022-41040Microsoft Exchange Server Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Exchange Server 2013 Cumulative Update 23 and 5 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 30, 2022; federal agencies had to remediate by Oct 21, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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Microsoft Exchange Server Elevation of Privilege Vulnerability
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-918
- Known exploited
- Added to CISA KEV Sep 30, 2022; federal remediation due Oct 21, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 99.96% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 microsoft:exchange_server_2013_cumulative_update_23 (from the name) | from 15.00.0 before 15.00.1497.044 | CNA record |
Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 microsoft:exchange_server_2016_cumulative_update_22 (from the name) | from 15.0.0 before 15.01.2375.037 | CNA record |
Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 microsoft:exchange_server_2019_cumulative_update_11 (from the name) | from 15.02.0 before 15.02.0986.036 | CNA record |
Microsoft Microsoft Exchange Server 2019 Cumulative Update 12 microsoft:exchange_server_2019_cumulative_update_12 (from the name) | from 15.02.0 before 15.02.1118.020 | CNA record |
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 microsoft:exchange_server_2016_cumulative_update_23 (from the name) | from 15.01.0 before 15.01.2507.016 | CNA record |
microsoft exchange_server microsoft:exchange_server | 2013; 2016; 2016; 2019; 2019 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040vendor-advisory, patch
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.