Microsoft Exchange Server
CVE-2020-17085 — Microsoft Exchange Server Denial of Service Vulnerability
Executive Summary
None
Overview
6.2
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
Low
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.4
EPSS Score
0.03365
probability of exploitation in the next 30 days
0.8717 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
5 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2013 Cumulative Update 23 | 4588741 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 17 | 4588741 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 18 | 4588741 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 6 | 4588741 (Security Update) |
Important | Denial of Service | Maybe |
| Microsoft Exchange Server 2019 Cumulative Update 7 | 4588741 (Security Update) |
Important | Denial of Service | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4588741 |
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
References
On This Page