Microsoft · Security update · February 10, 2026
KB5002835: February 2026 security update
KB5002835, released February 10, 2026, fixes 3 CVEs in Office Online Server. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
3
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0063
50th percentile
Priority of the 3 CVEs
Patch now 0
Urgent 0
High 1
Routine 2
Applies to
| Product |
|---|
| Office Online Server |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-21259 | Microsoft Office Excel | Elevation of Privilege | 7.8 | 0.0055 | Exploitation Less Likely |
| Routine | CVE-2026-21258 | Microsoft Office Excel | Information Disclosure | 5.5 | 0.0063 | Exploitation Less Likely |
| Routine | CVE-2026-21261 | Microsoft Office Excel | Information Disclosure | 5.5 | 0.0063 | Exploitation Less Likely |
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