CVE-2021-28481

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected

Microsoft · Microsoft Exchange Server 2019 Cumulative Update 9 · Microsoft Exchange Server 2016 Cumulative Update 20 · Microsoft Exchange Server 2013 Cumulative Update 23 · Microsoft Exchange Server 2016 Cumulative Update 19 · Microsoft Exchange Server 2019 Cumulative Update 8

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

36.24% chance of exploitation in the next 30 days, 98th percentile

Nuclei

critical

Published

2021-04-13

Updated

2024-08-03

Proof-of-concept exploits (1)

• ZephrFish/CVE-2021-28480_HoneyPoC310★ · 2026-07-31

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-28481.yaml

Security advisories

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28481

References

• CVE Record
• NVD entry

Related

• CVE-2020-1350
• CVE-2020-16898
• CVE-2020-1920
• CVE-2021-22893
• CVE-2021-23388
• CVE-2021-24316