CVE-2026-20963
unknown
KEV
CVSS v3
—
CVSS v2
—
VIR risk
1.5
Description
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
CISA KEV
- Vendor
- Microsoft
- Product
- SharePoint
- Due date
- 2026-03-21
Predictions
Exploit likelihood
99%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: cisa-kev — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963 ; https://nvd.nist.gov/vuln/detail/CVE-2026-20963
Mitigation details
Source: Microsoft Security Response Center · View original ↗ · proprietary-no-redistribution
Full prose not cached — VIR stores only structured fields (affected/fixed versions, references) for this source. Click "View original" above for the vendor's full advisory.
Affected
| Vendor | Product | Version |
|---|---|---|
| microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | |
| microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | |
| microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | |
| microsoft | Windows Server 2012 | |
| microsoft | Windows Server 2012 (Server Core installation) | |
| microsoft | Windows Server 2012 R2 | |
| microsoft | Windows Server 2012 R2 (Server Core installation) | |
| microsoft | Microsoft Excel 2016 (32-bit edition) | |
| microsoft | Microsoft Excel 2016 (64-bit edition) | |
| microsoft | Microsoft Word 2016 (32-bit edition) | |
| microsoft | Microsoft Word 2016 (64-bit edition) | |
| microsoft | Microsoft Office 2016 (32-bit edition) | |
| microsoft | Microsoft Office 2016 (64-bit edition) | |
| microsoft | Windows Server 2016 | |
| microsoft | Office Online Server | |
| microsoft | Windows 10 Version 1607 for 32-bit Systems | |
| microsoft | Windows 10 Version 1607 for x64-based Systems | |
| microsoft | Windows Server 2016 (Server Core installation) | |
| microsoft | Microsoft SharePoint Enterprise Server 2016 | |
| microsoft | Windows 10 Version 1809 for 32-bit Systems | |
| microsoft | Windows 10 Version 1809 for x64-based Systems | |
| microsoft | Windows Server 2019 | |
| microsoft | Windows Server 2019 (Server Core installation) | |
| microsoft | Microsoft Office 2019 for 32-bit editions | |
| microsoft | Microsoft Office 2019 for 64-bit editions | |
| microsoft | Microsoft SharePoint Server 2019 | |
| microsoft | Microsoft Edge (Chromium-based) | |
| microsoft | Microsoft 365 Apps for Enterprise for 32-bit Systems | |
| microsoft | Microsoft 365 Apps for Enterprise for 64-bit Systems | |
| microsoft | Windows Server 2022 | |
Exploits
References
Verify integrity in audit chain (admin only). AS-IS.