← Lark216 Home

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 30, 2026 12:10 AM EDT

Microsoft Services 1
Product families
Microsoft 365
Clear
Needs Attention All Updates
2 results · clear filters
Advanced Filters
Review Recommended

CVE-2026-70571: Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange 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 (KB5128896, KB5128895, KB5128898 and 1 more).

Severity Critical Exploited No Disclosed No Affects Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14 (+2 more) Fix KB5128896, KB5128895, KB5128898 and 1 more

What you should do

If you run the affected products, install Microsoft's update (KB5128896, KB5128895, KB5128898 and 1 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

Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Severity
Critical · CVSS 8.1
Type
Security updates
Services
Exchange Online
Tags
Microsoft Exchange Server, Remote Code Execution, 2026-Oct
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-2026-62911: Microsoft Exchange Server Elevation of Privilege Vulnerability

Microsoft Exchange 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 (KB5121576, KB5121573, KB5121574 and 1 more).

Severity Critical Exploited No Disclosed No Affects Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14 (+2 more) Fix KB5121576, KB5121573, KB5121574 and 1 more

What you should do

If you run the affected products, install Microsoft's update (KB5121576, KB5121573, KB5121574 and 1 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

Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Severity
Critical · CVSS 8.0
Type
Security updates
Services
Exchange Online
Tags
Microsoft Exchange Server, 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.