Vulnerability · Published Apr 13, 2021 · Assigned by microsoft
CVE-2021-28481Microsoft Exchange Server Remote Code Execution Vulnerability
Critical 9.8
In plain English
A critical-severity security flaw in Microsoft Exchange Server 2013 Cumulative Update 23 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 36.2% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)36.2%top 1.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Nuclei
Official description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 9 | 15.02.0 – before 15.02.0858.010 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 20 | 15.01.0 – before 15.01.2242.008 |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | 15.00.0 – before 15.00.1497.015 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 19 | 15.01.0 – before 15.01.2176.012 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 8 | 15.02.0 – before 15.02.0792.013 |