CRITICAL 9.1 Microsoft
CVE-2021-27078
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Security Update 2021-Mar: Microsoft Exchange Server Remote Code Execution Vulnerability
Affected Products
- Microsoft Exchange Server 2016 Cumulative Update 19
- Microsoft Exchange Server 2019 Cumulative Update 8
- Microsoft Exchange Server 2013 Cumulative Update 23
- Microsoft Exchange Server 2019 Cumulative Update 7
- Microsoft Exchange Server 2016 Cumulative Update 18
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27078
- https://nvd.nist.gov/vuln/detail/CVE-2021-27078
This critical severity vulnerability with a CVSS score of 9.1 was published on 2021-03-09 via Microsoft. EPSS score: 18.3% (top 3% of all CVEs by exploitation probability). Affected: Microsoft Exchange Server 2016 Cumulative Update 19, Microsoft Exchange Server 2019 Cumulative Update 8, Microsoft Exchange Server 2013 Cumulative Update 23 and 2 more.
Risk Timeline
CVE Disclosed2021-03-09 · 1989 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27078NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2021-27078Related Vulnerabilities
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2026-63508 | Microsoft Planetary Computer Pro Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-65667 | Microsoft Teams Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-56191 | Microsoft Exchange Online Tampering Vulnerability | CRITICAL | 10.0 |
| CVE-2026-57106 | Data Quality Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-23652 | Microsoft Power Pages Remote Code Execution Vulnerability | CRITICAL | 10.0 |
| CVE-2026-41104 | Microsoft Planetary Computer Pro Information Disclosure Vulnerability | CRITICAL | 10.0 |
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