Microsoft Exchange Server
CVE-2019-1373 — Microsoft Exchange Remote Code Execution Vulnerability
Executive Summary
A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the logged in user. Exploitation of this vulnerability requires that a user run cmdlets via PowerShell. The security update addresses the vulnerability by correcting how Exchange serializes its metadata.
Overview
9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.18161
probability of exploitation in the next 30 days
0.96896 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
5 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2013 Cumulative Update 23 | 4523171 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 13 | 4523171 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 14 | 4523171 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 2 | 4523171 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 3 | 4523171 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4523171 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Pham Van Khanh from Viettel Cyber Security
References
On This Page