Microsoft Exchange Server
CVE-2021-41349 — Microsoft Exchange Server Spoofing Vulnerability
Executive Summary
None
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.7
EPSS Score
0.93877
probability of exploitation in the next 30 days
0.99834 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 | 5007409 (Security Update) |
Important | Spoofing | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 21 | 5007409 (Security Update) |
Important | Spoofing | Yes |
| Microsoft Exchange Server 2016 Cumulative Update 22 | 5007409 (Security Update) |
Important | Spoofing | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 10 | 5007409 (Security Update) |
Important | Spoofing | Yes |
| Microsoft Exchange Server 2019 Cumulative Update 11 | 5007409 (Security Update) |
Important | Spoofing | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
5007409 |
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
Ashish Kunwar
Wabaf3t
Rahul Maini with SecAid
MIke Xie
Tony Zhan with Dell
Sainath Reddy
Thomas Spring with Swisscom (Schweiz) AG
Harsh and Rahul with HTTPVoid
Olga Sviridova with Ecommpay
References
On This Page