Security
Microsoft security updates and public advisory evidence: affected products, fixing updates, exploitation and source coverage.
1474Microsoft CVEsreleased Tue 13 Oct
94Critical81 need an update · 13 fixed service-side
1Exploited in the wild
1Publicly disclosed
1In CISA KEV
256Revised since release
September 2026: 998 CVEs · 132 critical · 2 exploited · 2 in CISA KEV
Act first · October 2026
Exploited, KEV-listed, or publicly disclosedPatch next · critical, "exploitation more likely", or top 5% EPSS · needs an update183
Showing 3 of 183All critical
| CVE | Vulnerability | Severity | CVSS | EPSS | Impact | Status | Fixed by |
|---|---|---|---|---|---|---|---|
| CVE-2026-105726 | Microsoft Defender Information Disclosure VulnerabilityMicrosoft Defender | Important | 5.5 | 0.4% | Information DisclosureLocal | Revised 10 Nov | — |
| CVE-2026-70264 | Microsoft Defender Information Disclosure VulnerabilityMicrosoft Defender | Important | 5.5 | 0.5% | Information DisclosureLocal | — |
Advisories · October 2026
MSRC guidance without a CVE of its own · 1 advisory
Hardening changes for ReFS volumes on removable mediaStarting with Windows updates released on and after October 13, 2026, Microsoft is making hardening changes to the Resilient File System (ReFS) . This change is not enable by default until 2027. Please see Hardening changes for ReFS volumes on removable media for more information.