Detections
Analytics

CVE-2026-45659

high

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

https://securityaffairs.com/192730/security/microsoft-sharepoint-has-a-new-rce-flaw-if-you-havent-patched-yet-go-do-that.html

https://www.helpnetsecurity.com/2026/05/26/sharepoint-vulnerability-cve-2026-45659/

https://www.darkreading.com/vulnerabilities-threats/microsoft-issues-sharepoint-patch

https://thehackernews.com/2026/05/microsoft-patches-sharepoint-rce-flaw.html

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-05-27

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00503