CVE-2021-28483

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

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

CVSS v2.0 NVD

7.7 HIGHAV:A/AC:L/Au:S/C:C/I:C/A:C

EPSS

1.20% chance of exploitation in the next 30 days, 68th percentile

Published

2021-04-13

Updated

2024-08-03

Proof-of-concept exploits (1)

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

Security advisories

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28483

References

• CVE Record
• NVD entry

Related

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