9.8
Critical
Exploited
CVE-2024-21410 Microsoft Exchange Server Privilege Escalation Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns
Not observed so far
Weakness
CWE-287
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Exchange Server 2016 Cumulative Update 23 15.01 | 15.01.0 → < 15.01.2507.037 | 15.01.2507.037 |
| Microsoft Exchange Server 2019 Cumulative Update 13 15.02 | 15.02.0 → < 15.2.1544.004 | 15.2.1544.004 |
| Microsoft Exchange Server 2019 Cumulative Update 14 15.02 | 15.02.0 → < 15.2.1544.004 | 15.2.1544.004 |
References
- Microsoft Exchange Server Elevation of Privilege Vulnerability msrc.microsoft.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of Microsoft Exchange Server 2016 Cumulative Update 23
The 88 CVEs of Microsoft Exchange Server 2016 Cumulative Update 23 →
CVE-2026-87695
Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to…
7.8
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CVE-2026-87692
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges…
7.8
High
CVE-2026-70279
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows…
9.3
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CVE-2026-87696
Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate…
7.5
High