Microsoft · Security update · September 8, 2026
KB5126051: September 2026 security update
KB5126051, released September 8, 2026, fixes 2 CVEs in Microsoft .NET Framework 4.8 on Windows Server 2012 R2. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
2
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0084
57th percentile
Priority of the 2 CVEs
Patch now 0
Urgent 0
High 2
Routine 0
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-69522 | Visual Studio | Remote Code Execution | 8.8 | 0.0084 | Exploitation Unlikely |
| High | CVE-2026-62886 | .NET | Elevation of Privilege | 7.8 | 0.0047 | Exploitation Less Likely |
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