CVE-2026-20963 — Actively Exploited: SharePoint (Microsoft)
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
| CVE ID | CVE-2026-20963 |
|---|---|
| Vendor | Microsoft |
| Product | SharePoint |
| Vulnerability name | Microsoft SharePoint Deserialization of Untrusted Data Vulnerability |
| Date added | 2026-03-18 |
| Remediation due | 2026-03-21 |
| Known ransomware use | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
| Description | Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network. |
| Source | CISA Known Exploited Vulnerabilities |
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