What is CVE-2026-80095?

CVE-2026-80095 is a critical-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-11-10.

How severe is CVE-2026-80095?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XSS in Microsoft Sharepoint Server Subscription Edition

CVE-2026-80095

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Sharepoint Server Subscription Edition

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80095 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-80095?: CVE-2026-80095 is a critical-severity vulnerability in Microsoft Sharepoint Server Subscription Edition, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-11-10.
How severe is CVE-2026-80095?: Critical severity. CVSS v3 base score is 9.0 out of 10.