Microsoft · Security update · November 10, 2026
KB5133453: November 2026 security update
KB5133453, released November 10, 2026, fixes 9 CVEs in Microsoft Exchange Server Subscription Edition RTM. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
9
1 rated Critical
Exploited
0
None reported
Exploitation more likely
1
Microsoft's assessment
Highest EPSS
n/a
Priority of the 9 CVEs
Patch now 0
Urgent 1
High 7
Routine 1
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-118207 | Microsoft Exchange Server | Remote Code Execution | 8.8 | n/a | More likely |
| High | CVE-2026-118149 | Microsoft Exchange Server | Remote Code Execution | 8.8 | n/a | Exploitation Unlikely |
| High | CVE-2026-118150 | Microsoft Exchange Server | Elevation of Privilege | 8.8 | n/a | Exploitation Less Likely |
| High | CVE-2026-118154 | Microsoft Exchange Server | Elevation of Privilege | 8.8 | n/a | Exploitation Less Likely |
| High | CVE-2026-118153 | Microsoft Exchange Server | Denial of Service | 7.5 | n/a | Exploitation Less Likely |
| High | CVE-2026-118151 | Microsoft Exchange Server | Elevation of Privilege | 7.2 | n/a | Exploitation Less Likely |
| High | CVE-2026-118157 | Microsoft Exchange Server | Elevation of Privilege | 7.2 | n/a | Exploitation Less Likely |
| High | CVE-2026-118208 | Microsoft Exchange Server | Spoofing | 7.1 | n/a | Exploitation Less Likely |
| Routine | CVE-2026-118152 | Microsoft Exchange Server | Spoofing | 6.5 | n/a | Exploitation Less Likely |
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