CVE-2023-21707

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected

Microsoft · Microsoft Exchange Server 2013 Cumulative Update 23 · Microsoft Exchange Server 2016 Cumulative Update 23 · Microsoft Exchange Server 2019 Cumulative Update 11 · Microsoft Exchange Server 2019 Cumulative Update 12

CVSS v3.1 MICROSOFT

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

82.02% chance of exploitation in the next 30 days, 100th percentile

Published

2023-02-14

Updated

2026-08-19

Proof-of-concept exploits (2)

• N1k0la-T/CVE-2023-2170728★ · 2023-07-06
• FDlucifer/Proxy-Attackchain562★ · 2023-12-07

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21707

References

• CVE Record
• NVD entry

Related

• CVE-2023-36745
• CVE-2021-4034
• CVE-2021-41278