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MEDIUM · 4.6

CVE-2026-20959

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.

Vulnerability Description

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.

CVSS Score

4.6

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftSharepoint Server< 16.0.19127.20442

Related Weaknesses (CWE)

CWE-79

References

FAQ

What is CVE-2026-20959?

CVE-2026-20959 is a vulnerability with a CVSS score of 4.6 (MEDIUM). 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.

How severe is CVE-2026-20959?

CVE-2026-20959 has been rated MEDIUM with a CVSS base score of 4.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20959?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Sharepoint Server.