Security
Microsoft security updates and public advisory evidence: affected products, fixing updates, exploitation and source coverage.
998Microsoft CVEsreleased Tue 8 Sep
132Critical105 need an update · 27 fixed service-side
2Exploited in the wild
0Publicly disclosed
2In CISA KEV
249Revised since release
Act first · September 2026
Exploited, KEV-listed, or publicly disclosedPatch next · critical, "exploitation more likely", or top 5% EPSS · needs an update154
Showing 3 of 154All critical
| CVE | Vulnerability | Severity | CVSS | EPSS | Impact | Status | Fixed by |
|---|---|---|---|---|---|---|---|
| CVE-2026-85885 | Microsoft 365 Copilot Elevation of Privilege VulnerabilityM365 Copilot | Critical | 9.9 | 0.7% | EoPNetwork | Service-side fix | |
| CVE-2026-78501 | Microsoft 365 Copilot Business Chat Information Disclosure VulnerabilityMicrosoft 365 Copilot's Business Chat | Critical | 8.6 | 0.5% | Information DisclosureNetwork | Revised 13 Oct | Service-side fix |
| CVE-2026-85887 | M365 Copilot Information Disclosure VulnerabilityM365 Copilot | Critical | 7.7 | 0.8% | Information DisclosureNetwork | Service-side fix |