CVE-2026-20959

5.4 mediumEPSS 7.7%

Medium (5.4) in microsoft sharepoint server. EPSS 7.7% chance of exploitation in the next 30 days.

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

Severity

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 7.7% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-01-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

microsoft:sharepoint_server

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959

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