High [CVE-2021-31196] Microsoft Exchange Server Remote Code Execution Vulnerability
This high-severity Microsoft Server advisory covers CVE-2021-31196 affecting Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 20, Microsoft Exchange Server 2016 Cumulative Update 21.
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Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 20; Microsoft Exchange Server 2016 Cumulative Update 21; Microsoft Exchange Server 2019 Cumulative Update 10; and 1 more.
Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 9.
CISA Known Exploited Vulnerability
- Listed:
- Aug 21, 2024 · federal remediation due Sep 11, 2024
- Required action:
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Ransomware use:
- Unknown
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- Microsoft Exchange Server 2013 Cumulative Update 23 15.00.0 before 15.00.1497.023
- Microsoft Exchange Server 2016 Cumulative Update 20 15.01.0 before 15.01.2242.012
- Microsoft Exchange Server 2016 Cumulative Update 21 15.01.0 before 15.01.2308.014
- Microsoft Exchange Server 2019 Cumulative Update 10 15.02.0 before 15.02.0922.013
- Microsoft Exchange Server 2019 Cumulative Update 9 15.02.0 before 15.02.0858.015
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 15.00.1497.023
- 15.01.2242.012
- 15.01.2308.014
- 15.02.0922.013
- 15.02.0858.015
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 15.00.1497.023, 15.01.2242.012, 15.01.2308.014, 15.02.0922.013, 15.02.0858.015. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
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