What is CVE-2026-45454?

CVE-2026-45454 is a medium-severity vulnerability in Microsoft Sharepoint_server, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-09.

How severe is CVE-2026-45454?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Path Traversal in Microsoft Sharepoint_server

CVE-2026-45454

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Sharepoint_server — versions 2016, 2019

Weakness classification (CWE)

CWE-22 — Path Traversal

References

secure@microsoft.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-45454?: CVE-2026-45454 is a medium-severity vulnerability in Microsoft Sharepoint_server, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-09.
How severe is CVE-2026-45454?: Medium severity. CVSS v3 base score is 6.5 out of 10.