CVE-2026-70332: Microsoft Microsoft SharePoint Online

Microsoft Office SharePoint Spoofing Vulnerability

CVSS 9.6 CriticalCriticalEPSS 0.0086 · 59th percentile

Critical, because:

CVSS score 9.6: 9.0 or more.

Published by the CVE Program (CNA: microsoft) at 6 Aug 2026, 23:22 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Microsoft SharePoint Online	affected -

Identifiers

CVE-2026-70332

CNA

microsoft

Weakness (CWE)

CWE-79

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Microsoft SharePoint Online is affected by a spoofing vulnerability caused by improper neutralization of input during web page generation (cross-site scripting). An unauthorized attacker can exploit this over a network to perform spoofing. The source gives few details on specific versions or conditions, and no fix or workaround is listed.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.6	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0086, the 59th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

6 Aug 2026, 23:22 UTC Confirmed by the CVE List

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70332 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.