CVE-2022-41082: Microsoft Exchange Server Remote Code Execution Vulnerability
Vulnerability summary
CVE-2022-41082 is a high (CVSS 8.0) Deserialization of Untrusted Data vulnerability in Microsoft Exchange Server. It is known to be exploited: CISA lists it, first on 30-09-2022. It has been used in ransomware campaigns. EPSS estimates a 99.97% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 30-09-2022Added to CISA KEVMicrosoft Exchange Server Remote Code Execution Vulnerability
- 03-10-2022PublishedVulnerability first disclosed.
- 21-10-2022CISA remediation dueApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST8.0HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
99.97%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
0.00 pp
From 99.97% on 21-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 30-09-2022
- Federal due date
- 21-10-2022
CISA required action
Apply updates per vendor instructions. msrc-blog.microsoft.com/2022/… nvd.nist.gov/vuln/detail/CVE-2022-41082
Public exploits
2 foundExploit Reference (packetstormsecurity.com)
Maturity: unknown
Microsoft Exchange ProxyNotShell RCE
exploit/windows/http/exchange_proxynotshell_rce
Maturity: weaponized
Weaknesses
CWE · root causeAffected systems
Microsoft6 products
- exchange_server2013:cumulative_update_23 | 2016:cumulative_update_22 | 2016:cumulative_update_23 | 2019:cumulative_update_11 | 2019:cumulative_update_12
- microsoft exchange server 2013 cumulative update 23≥ 15.00.0, < 15.00.1497.044
- microsoft exchange server 2016 cumulative update 22≥ 15.0.0, < 15.01.2375.037
- microsoft exchange server 2016 cumulative update 23≥ 15.01.0, < 15.01.2507.016
- microsoft exchange server 2019 cumulative update 11≥ 15.02.0, < 15.02.0986.036
1 vendor · 6 products
References
8 links
msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41082Vendor Advisory- www.vicarius.io/vsociety/…Third Party Advisory
- www.vicarius.io/vsociety/…Third Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41082X TransferredPatchVendor Advisory
- packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.htmlX TransferredExploitThird Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41082Government ResourceUS Government Resource