What is CVE-2023-38177?

CVE-2023-38177 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Deserialization of Untrusted Data. CVSS score: 6.1/10. Published 2023-11-14.

How severe is CVE-2023-38177?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Deserialization in Microsoft Sharepoint Enterprise Server 2016

CVE-2023-38177

Microsoft SharePoint Server Remote Code Execution Vulnerability

Vulnerability class: Insecure Deserialization

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.034 (88.5th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Server Subscription Edition — versions 16.0.0
Microsoft Sharepoint Enterprise Server — versions 2016
Microsoft Sharepoint Server — versions 2019

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38177 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-38177?: CVE-2023-38177 is a medium-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Deserialization of Untrusted Data. CVSS score: 6.1/10. Published 2023-11-14.
How severe is CVE-2023-38177?: Medium severity. CVSS v3 base score is 6.1 out of 10.