Microsoft · Security update · October 13, 2026
KB5131693: October 2026 security update
KB5131693, released October 13, 2026, fixes 3 CVEs in Skype for Business Server 2019 CU8. 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
Microsoft's assessment
Highest EPSS
0.0116
67th percentile
Priority of the 3 CVEs
Patch now 0
Urgent 0
High 2
Routine 1
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-70297 | Skype for Business and Microsoft Lync | Remote Code Execution | 8.8 | 0.0116 | Exploitation Less Likely |
| High | CVE-2026-83746 | Skype for Business and Microsoft Lync | Elevation of Privilege | 8.1 | 0.0115 | Exploitation Less Likely |
| Routine | CVE-2026-85873 | Skype for Business and Microsoft Lync | Elevation of Privilege | 6.5 | 0.0096 | Exploitation Less Likely |
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