CVE-2026-20963 — Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Severity: Critical · Kind: Vulnerability
What it is
AI offline placeholder summary for: Title: CVE-2026-20963 — Microsoft SharePoint Deserialization of Untrusted Data V.
Who this affects
AI summarisation is currently disabled — see the source link for the full upstream advisory.
What to do
Re-run summarisation from /admin/threats once ANTHROPIC_API_KEY is configured.
From the source
Microsoft SharePoint. Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network. 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.
Vulnerability facts
- CVE
- CVE-2026-20963
- On CISA KEV since
- 2026-03-18
- Ransomware use
- Unknown
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