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Microsoft Update Intelligence

Administrator notices from Microsoft, summarised: what changed, and what you should do.

Latest Weekly DigestOct 19 – Oct 25, 20264 service updates · 1 security advisory →
0Action Required 270Review Recommended

Last updated Oct 29, 2026 9:59 PM EDT

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CVE-2026-102866: Microsoft Office SharePoint Elevation of Privilege Vulnerability

Microsoft Office SharePoint Elevation of Privilege Vulnerability. Microsoft rates it Critical; not reported as exploited; not publicly disclosed; exploitability assessment: Exploitation Less Likely. Microsoft publishes a customer-installable fix (KB5002927).

Severity Critical Exploited No Disclosed No Affects Microsoft SharePoint Server Subscription Edition Fix KB5002927

What you should do

If you run the affected products, install Microsoft's update (KB5002927); the advisory lists the exact build per product. from Microsoft's advisory data

Why: Microsoft lists a customer-installable fix, so it matters if you run the affected products.

Microsoft 365 / Office · msrc Original Microsoft announcement ↗
Details

Original Microsoft text

Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Severity
Critical · CVSS 8.1
Type
Security updates
Services
SharePoint
Tags
Microsoft Office SharePoint, Elevation of Privilege, 2026-Oct
Microsoft advisory data
Customer action required: Yes · Exploited: No · Publicly disclosed: No · Exploitation Less Likely · Remediation: update published
Classification
Derived from Microsoft's structured advisory fields, not by AI. Severity (Critical) is Microsoft's rating and is not treated as proof that action is needed.
Review Recommended

CVE-2026-65665: Microsoft SharePoint Server Remote Code Execution Vulnerability

Microsoft SharePoint Server Remote Code Execution Vulnerability. Microsoft rates it Critical; not reported as exploited; not publicly disclosed; exploitability assessment: Exploitation More Likely. Microsoft publishes a customer-installable fix (KB5002894, KB5002896, KB5002893).

Severity Critical Exploited No Disclosed No Affects Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition Fix KB5002894, KB5002896, KB5002893

What you should do

If you run the affected products, install Microsoft's update (KB5002894, KB5002896, KB5002893); the advisory lists the exact build per product. from Microsoft's advisory data

Why: Microsoft lists a customer-installable fix, so it matters if you run the affected products.

Microsoft 365 / Office · msrc Original Microsoft announcement ↗
Details

Original Microsoft text

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Severity
Critical · CVSS 8.8
Type
Security updates
Services
SharePoint
Tags
Microsoft Office SharePoint, Remote Code Execution, 2026-Aug
Microsoft advisory data
Customer action required: Yes · Exploited: No · Publicly disclosed: No · Exploitation More Likely · Remediation: update published
Classification
Derived from Microsoft's structured advisory fields, not by AI. Severity (Critical) is Microsoft's rating and is not treated as proof that action is needed.
Review Recommended

CVE-2026-64921: Microsoft SharePoint Server Elevation of Privilege Vulnerability

Microsoft SharePoint Server Elevation of Privilege Vulnerability. Microsoft rates it Critical; not reported as exploited; not publicly disclosed; exploitability assessment: Exploitation Less Likely. Microsoft publishes a customer-installable fix (KB5002905, KB5002906, KB5002894 and 2 more).

Severity Critical Exploited No Disclosed No Affects Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 (+1 more) Fix KB5002905, KB5002906, KB5002894 and 2 more

What you should do

If you run the affected products, install Microsoft's update (KB5002905, KB5002906, KB5002894 and 2 more); the advisory lists the exact build per product. from Microsoft's advisory data

Why: Microsoft lists a customer-installable fix, so it matters if you run the affected products.

Microsoft 365 / Office · msrc Original Microsoft announcement ↗
Details

Original Microsoft text

Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Severity
Critical · CVSS 8.8
Type
Security updates
Services
SharePoint
Tags
Microsoft Office SharePoint, Elevation of Privilege, 2026-Aug
Microsoft advisory data
Customer action required: Yes · Exploited: No · Publicly disclosed: No · Exploitation Less Likely · Remediation: update published
Classification
Derived from Microsoft's structured advisory fields, not by AI. Severity (Critical) is Microsoft's rating and is not treated as proof that action is needed.
Review Recommended

CVE-2026-62827: Microsoft SharePoint Server Elevation of Privilege Vulnerability

Microsoft SharePoint Server Elevation of Privilege Vulnerability. Microsoft rates it Critical; not reported as exploited; not publicly disclosed; exploitability assessment: Exploitation Less Likely. Microsoft publishes a customer-installable fix (KB5002905, KB5002906, KB5002894 and 2 more).

Severity Critical Exploited No Disclosed No Affects Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 (+1 more) Fix KB5002905, KB5002906, KB5002894 and 2 more

What you should do

If you run the affected products, install Microsoft's update (KB5002905, KB5002906, KB5002894 and 2 more); the advisory lists the exact build per product. from Microsoft's advisory data

Why: Microsoft lists a customer-installable fix, so it matters if you run the affected products.

Microsoft 365 / Office · msrc Original Microsoft announcement ↗
Details

Original Microsoft text

Improper authentication in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Severity
Critical · CVSS 8.8
Type
Security updates
Services
SharePoint
Tags
Microsoft Office SharePoint, Elevation of Privilege, 2026-Aug
Microsoft advisory data
Customer action required: Yes · Exploited: No · Publicly disclosed: No · Exploitation Less Likely · Remediation: update published
Classification
Derived from Microsoft's structured advisory fields, not by AI. Severity (Critical) is Microsoft's rating and is not treated as proof that action is needed.