# CVE-2022-41040 (ProxyNotShell)

Microsoft Exchange Server Elevation of Privilege Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2022-41040
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2022-09-30; CISA due date 2022-10-21; known ransomware use
- EPSS: 99.96% (percentile 100.0)
- Public exploit code: 1 Metasploit module · 9 GitHub proofs of concept (first 2022-10-02)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2024-02-23)
- Weakness: CWE-918
- Published: 2022-10-03

## Affected versions

- Microsoft Microsoft Exchange Server 2013 Cumulative Update 23: affected >= 15.00.0 and < 15.00.1497.044
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 22: affected >= 15.0.0 and < 15.01.2375.037
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23: affected >= 15.01.0 and < 15.01.2507.016
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 11: affected >= 15.02.0 and < 15.02.0986.036
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 12: affected >= 15.02.0 and < 15.02.1118.020

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040
- [other] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040
- [advisory] https://www.kb.cert.org/vuls/id/915563
- [other] http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html
- [other] https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.