What is CVE-2023-32031?

CVE-2023-32031 is a high-severity vulnerability in Microsoft Exchange Server 2016 Cumulative Update 23, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2023-06-14.

How severe is CVE-2023-32031?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-32031 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Microsoft Exchange Server 2016 Cumulative Update 23

CVE-2023-32031

Microsoft Exchange Server Remote Code Execution Vulnerability

Vulnerability class: Insecure Deserialization

EPSS: 0.477 (97.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Exchange Server 2016 Cumulative Update 23 — versions 15.01.0
Microsoft Exchange Server 2019 Cumulative Update 12 — versions 15.02.0
Microsoft Exchange Server 2019 Cumulative Update 13 — versions 15.02.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

Microsoft Exchange Server Remote Code Execution Vulnerability (vendor-advisory)

Frequently asked questions

What is CVE-2023-32031?: CVE-2023-32031 is a high-severity vulnerability in Microsoft Exchange Server 2016 Cumulative Update 23, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2023-06-14.
How severe is CVE-2023-32031?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-32031 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.