---
id: "CVE-2022-41082"
kind: "vulnerability"
aliases: ["CVE-2022-41082"]
title: "Microsoft Exchange Server Remote Code Execution Vulnerability"
severity: "critical"
cvss: 8.0
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Microsoft Exchange Server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft exchange server", "fixed": [], "affected": "= 2013", "ecosystem": "vendor"}, {"name": "microsoft exchange server", "fixed": [], "affected": "= 2016", "ecosystem": "vendor"}, {"name": "microsoft exchange server", "fixed": [], "affected": "= 2019", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exchange-server", "exploited", "on-prem-exchange", "ransomware", "vendor", "windows"]
not_affected_if: ["exchange-online", "no-exchange-server"]
published_at: "2022-09-30T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-41082", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41082", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server has an unspecified flaw that lets an authenticated user run code remotely, and it is chained with CVE-2022-41040 (ProxyNotShell). Attackers are exploiting it in the wild, including in ransomware campaigns.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Exchange Server affected ? fixed ?
- vendor:microsoft exchange server affected = 2013 fixed ?
- vendor:microsoft exchange server affected = 2016 fixed ?
- vendor:microsoft exchange server affected = 2019 fixed ?

## Fix

Apply the Microsoft updates for Exchange Server per vendor instructions; the specific patched build numbers are not in the sources.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-41082
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-41082

## From the sources

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.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_