What is CVE-2023-21764?

CVE-2023-21764 is a high-severity vulnerability in Microsoft Exchange Server, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2023-01-10.

How severe is CVE-2023-21764?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Exchange Server

CVE-2023-21764

Microsoft Exchange Server Elevation of Privilege Vulnerability

EPSS: 0.006 (43.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Exchange_server — versions 2016, 2019
Microsoft Exchange Server 2016 Cumulative Update 23 — versions 15.01.0
Microsoft Exchange Server 2019 Cumulative Update 11 — versions 15.02.0
Microsoft Exchange Server 2019 Cumulative Update 12 — versions 15.02.0

Weakness classification (CWE)

CWE-426 — Untrusted Search Path

References

secure@microsoft.com (vendor-advisory)

Frequently asked questions

What is CVE-2023-21764?: CVE-2023-21764 is a high-severity vulnerability in Microsoft Exchange Server, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2023-01-10.
How severe is CVE-2023-21764?: High severity. CVSS v3 base score is 7.8 out of 10.