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CVE-2026-70332: Microsoft Office SharePoint Spoofing Vulnerability

criticalCVSS 9.6CVE-2026-70332
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

CSIRTS triage

vendor: Microsoftproduct: Office SharePointCross-site scripting
What
Improper neutralization of input during web page generation allows cross-site scripting attacks.
Who is affected
All Office SharePoint deployments are affected.
Urgency
Critical severity (CVSS 9.6) with no current exploitation reported; immediate patching required.
Action
Apply Microsoft security updates for Office SharePoint when released.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.6
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70332

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-70332coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Office SharePoint

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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