Microsoft · Security update · December 9, 2025
KB5002817: December 2025 security update
KB5002817, released December 9, 2025, fixes 5 CVEs in Office Online Server. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
5
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0061
49th percentile
Priority of the 5 CVEs
Patch now 0
Urgent 0
High 5
Routine 0
Applies to
| Product |
|---|
| Office Online Server |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2025-62563 | Microsoft Office Excel | Remote Code Execution | 7.8 | 0.0061 | Exploitation Less Likely |
| High | CVE-2025-62556 | Microsoft Office Excel | Remote Code Execution | 7.8 | 0.0056 | Exploitation Less Likely |
| High | CVE-2025-62560 | Microsoft Office Excel | Remote Code Execution | 7.8 | 0.0052 | Exploitation Unlikely |
| High | CVE-2025-62561 | Microsoft Office Excel | Remote Code Execution | 7.8 | 0.0052 | Exploitation Less Likely |
| High | CVE-2025-62564 | Microsoft Office Excel | Remote Code Execution | 7.8 | 0.0052 | Exploitation Less Likely |
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