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CVE-2023-21529Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
8.8 HIGHEPSS 59.29%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.8 | HIGH | 3.1microsoft (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 8.8 | HIGH | 3.1microsoft (CNA) | 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 |
CISA required action
⚡ Known exploited · remediation due Apr 27, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2023-21529
- Status
- Analyzed
- Assigner (CNA)
- microsoft
- Published
- Feb 14, 2023
- Last modified
- 2026-08-19 17:18 UTC
- Weaknesses
- CWE-502 · Deserialization of Untrusted Data
Affected Products
As published by the CNA in the CVE record.
MicrosoftMicrosoft Exchange Server 2013 Cumulative Update 231 version range
- 15.00.0 before 15.00.1497.047
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 231 version range
- 15.01.0 before 15.01.2507.021
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 111 version range
- 15.02.0 before 15.02.0986.041
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 121 version range
- 15.02.0 before 15.02.1118.025
References
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=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/