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CVEs published in September 2026
Vulnerabilities added to CVE Radar in September 2026, newest first.
- CVE-2026-67378 CRITICAL 9
- CVE-2026-67636 CRITICAL 9
- CVE-2026-76420 CRITICAL 9
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CVE-2026-67278
RouterOS RSA signature verification allows TLS/SSH impersonationCRITICAL 9.1
- PATCH AVAILABLE
- CVE-2026-86131 CRITICAL 9.2
- CVE-2026-101891 CRITICAL 9.3
- CVE-2026-86102 CRITICAL 9.3
- CVE-2026-76969 CRITICAL 9.4
- CVE-2026-20212 CRITICAL 9.8
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CVE-2026-62916
Microsoft Entra authentication bypass lets unauthenticated attacker elevate privilegesCRITICAL 9.8
- PATCH AVAILABLE
- CVE-2026-77092 CRITICAL 9.8
- CVE-2026-77098 CRITICAL 9.8
- CVE-2026-77089 CRITICAL 9.8
- CVE-2026-12745 CRITICAL 9.8
- CVE-2026-12744 CRITICAL 9.8
- CVE-2026-67631 CRITICAL 9.8
- CVE-2026-67643 CRITICAL 9.8
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CVE-2026-78509
Microsoft 365 Apps heap buffer overflow remote code executionCRITICAL 9.8
- PATCH AVAILABLE
- CVE-2026-81352 CRITICAL 9.8
- CVE-2026-66302 CRITICAL 9.8
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