Microsoft Exchange Server
CVE-2020-17142 — Microsoft Exchange Remote Code Execution Vulnerability
Executive Summary
None
Overview
9.1
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:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.2
EPSS Score
0.03118
probability of exploitation in the next 30 days
0.86662 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
5 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2013 Cumulative Update 23 | 4593466 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 17 | 4593465 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 18 | 4593465 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 6 | 4593465 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 7 | 4593465 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
4593466 |
Security Update | Maybe |
4593465 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
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