Microsoft Exchange Server
CVE-2022-21979 — Microsoft Exchange Server Information Disclosure Vulnerability
Executive Summary
None
Overview
4.8
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:L/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.2
EPSS Score
0.0175
probability of exploitation in the next 30 days
0.7493 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 | 5019076 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 22 | 5019077 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 23 | 5019077 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 11 | 5019077 (Security Update) |
Important | Information Disclosure | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 12 | 5019077 (Security Update) |
Important | Information Disclosure | Yes |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
5019076 |
Security Update | Yes |
5019077 |
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
References
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