CVE-2023-21529
Microsoft Exchange Server Remote Code Execution Vulnerability
CVSS Score
8.8
EPSS Score
36.7%
EPSS Percentile
97th
Microsoft Exchange Server Remote Code Execution Vulnerability
| Vendor | microsoft |
| Product | microsoft exchange server 2019 cumulative update 12 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Feb 14, 2023 |
| Last Updated | Apr 14, 2026 |
⚠️ Actively Exploited — Act Now
Get instant alerts for microsoft microsoft exchange server 2019 cumulative update 12
This vulnerability is actively exploited in the wild. Set up free real-time alerts so you're first to know about threats like CVE-2023-21529.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft Exchange Server 2019 Cumulative Update 12
15.02.0 < 15.02.1118.025
Microsoft / Microsoft Exchange Server 2019 Cumulative Update 11
15.02.0 < 15.02.0986.041
Microsoft / Microsoft Exchange Server 2013 Cumulative Update 23
15.00.0 < 15.00.1497.047
Microsoft / Microsoft Exchange Server 2016 Cumulative Update 23
15.01.0 < 15.01.2507.021
References
msrc.microsoft.com: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529 microsoft.com: https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/ cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529