Microsoft · Security update · May 12, 2026
KB5002578: May 2026 security update
KB5002578, released May 12, 2026, fixes 1 CVE across 2 products. None of them is reported as exploited. Patch Radar priority: Routine.
Routine
CVEs closed
1
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0032
25th percentile
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Routine | CVE-2026-21530 | Windows Rich Text Edit | Elevation of Privilege | 6.7 | 0.0032 | Exploitation Less Likely |
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