633
CVEs This Month
56
Critical
577
Important
1
Exploited in Wild
What is a CVE?
A CVE (Common Vulnerabilities and Exposures) is a publicly registered security flaw in a software product. Each one gets a unique ID like
CVE-2026-69579 — the year and a sequence number. Microsoft bundles fixes for all known CVEs into monthly Patch Tuesday releases.CVSS Score — the risk number
Every CVE gets a CVSS score from 0.0 to 10.0. It captures: is this remotely exploitable? Does the attacker need a user to click something? How much damage can they do? A 9.8 means unauthenticated, remote, no user interaction. The large number on each row is that score.
Vulnerability types
RCE — attacker runs code on the device
EoP — standard user becomes SYSTEM (common in ransomware chains)
Info Disclosure — data leaks out
DoS — service crashes, no data stolen
SFB — security control bypassed (e.g. SmartScreen)
EoP — standard user becomes SYSTEM (common in ransomware chains)
Info Disclosure — data leaks out
DoS — service crashes, no data stolen
SFB — security control bypassed (e.g. SmartScreen)
What to do
1. Apply KB5124008 — one update fixes all 633 CVEs for Windows 11 24H2/25H2.
2. Prioritise Critical + CVSS 9+ — especially CVE-2026-81963 (actively exploited EoP).
3. Server admins: RRAS, Netlogon, SSTP all have Critical RCEs this month.
2. Prioritise Critical + CVSS 9+ — especially CVE-2026-81963 (actively exploited EoP).
3. Server admins: RRAS, Netlogon, SSTP all have Critical RCEs this month.
CVSS distribution — all 633 September 2026 CVEs
Below 6 · 93
6.x · 31
7.x · 370
8.x · 115
9+ · 24
September 2026 pattern: Elevation of Privilege dominates (390 CVEs — 62%). The 56 Critical CVEs are notably high vs Jul 2026 (19) and Aug 2026 (23). The single exploited CVE — CVE-2026-81963 — is a Windows Update Stack EoP observed in ransomware pre-staging; apply KB5124008 (build 26100.9445+) immediately.
Severity
Type
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