CVE-2026-20963 — Microsoft SharePoint: Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
CVE-2026-20963 — Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
What This Means For You
- CISA has confirmed active exploitation — immediate patching required.
- Added to CISA KEV catalog — federal agencies must remediate by 2026-03-21.
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-20963 | Deserialization | Microsoft SharePoint, deserialization of untrusted data vulnerability, allows remote code execution |
| CVE-2026-20963 | RCE | Microsoft SharePoint, remote code execution over a network |
Source & Attribution
| Source Platform | CISA |
| Channel | CISA KEV |
| Published | March 18, 2026 at 14:00 UTC |
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