CVE record · 4 sources
CVE-2026-102866
CVSS 8.1Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
- Vendor
- Microsoft
- Product
- office, sharepoint
- CVSS
- 8.1
- EPSS
- 0.007 (p52)
- Exposure class
- Collaboration, Endpoint security
Coverage
4Every item in the archive that references this CVE, highest rank first. Headlines open the publisher.
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Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
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Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for October 2026, which includes 1415 vulnerabilities affecting a range of products, including 85 that Microsoft marked as "critical."
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CVE-2026-102866 Microsoft Office SharePoint Elevation of Privilege Vulnerability
Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
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The October 2026 Security Update Review
Another month of patches equals another new record for Microsoft patches. It’s a good thing I survive Pwn2Own Ireland , because between these and the Adobe patches, there’s much to discuss. I’m also looking at different ways I…