Microsoft Exchange Server
CVE-2021-34473 — Microsoft Exchange Server Remote Code Execution Vulnerability
Executive Summary
None
Overview
9.1
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.9
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
5 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2013 Cumulative Update 23 | 5001779 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 9 | 5001779 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 20 | 5001779 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 19 | 5001779 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 8 | 5001779 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
5001779 |
Security Update | Yes |
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
Orange Tsai(@orange_8361) from DEVCORE Research Team working with Trend Micro Zero Day Initiative
References
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