CVE-2026-70332: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office Share

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CRITICAL 9.6WATCHLISTMITIGATE

CVE-2026-70332 is a critical-severity flaw (CVSS 9.6) affecting sharepoint online. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-08-07
Last modified	2026-10-23

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Am I affected?

Timeline

2026-08-07 00:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

microsoft sharepoint online MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sharepoint-online || rpm -q sharepoint-online || sharepoint-online --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · pspp · FIXED · 2.1.3-2.fc46 · FEDORA-2026-0d6444911b · source

sudo dnf upgrade --advisory=FEDORA-2026-0d6444911b

Fedora ELN · barman · FIXED · 3.20.1-3.eln159 · FEDORA-2026-45ecf042c2 · source

sudo dnf upgrade --advisory=FEDORA-2026-45ecf042c2

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70332?

sharepoint online: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-70332 being exploited?

CVE-2026-70332 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70332 affect?

CVE-2026-70332 affects sharepoint online. Severity is critical (CVSS 9.6). 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.

How urgent is CVE-2026-70332?

Priority 53/100. Critical severity; On your watchlist

References

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