CVE-2026-70332 — Microsoft Sharepoint Online
CRITICALCVE-2026-70332 is a critical-severity (CVSS 9.6) Cross-site Scripting (XSS) vulnerability in microsoft sharepoint online. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
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.
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-70332.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
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.
Affected Products
sharepoint onlinemicrosoftDetection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft sharepoint online deployment and check each version against the affected-products list above.
Remediation status
The records we use list no fixed version for CVE-2026-70332. Check the microsoft sharepoint online advisory for a patched release, and apply the workarounds below until you can upgrade.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-70332 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.