CVEs / CVE-2022-41082
CVE-2022-41082: Microsoft Exchange Server Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 30 Sep 2022
- high 8 CVSS 3.1 (from the CNA)
- EPSS 99.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft Exchange Server 2013 Cumulative Update 23 | from 15.00.0, before 15.00.1497.044 | 15.00.1497.044 |
| Microsoft Microsoft Exchange Server 2016 Cumulative Update 22 | from 15.0.0, before 15.01.2375.037 | 15.01.2375.037 |
| Microsoft Microsoft Exchange Server 2019 Cumulative Update 11 | from 15.02.0, before 15.02.0986.036 | 15.02.0986.036 |
| Microsoft Microsoft Exchange Server 2019 Cumulative Update 12 | from 15.02.0, before 15.02.1118.020 | 15.02.1118.020 |
| Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 | from 15.01.0, before 15.01.2507.016 | 15.01.2507.016 |
Exploitation
| In CISA KEV since | 30 Sep 2022 |
|---|---|
| Due date for US federal agencies | 21 Oct 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8 highCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2022-41082 on NVD
- CVE-2022-41082 in the CISA KEV catalog
- https://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/ (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082 Vendor Advisory
- http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082 Patch, Vendor Advisory
- https://www.kb.cert.org/vuls/id/915563 Third 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.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-detection-script Third Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2022-41082-microsoft-exchange-server-remote-code-execution-vulnerability-mitigation-script Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41082 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.