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Oracle September 2026 Critical Security Patch Update addresses 672 CVEs
Oracle's September 2026 CSPU fixes 672 CVEs across 673 patches, including 104 critical updates, with E-Business Suite receiving the most patches (159).
Oracle released its September 2026 Critical Security Patch Update fixing 672 unique CVEs via 673 security updates across 17 product families, with 104 patches (15.5%) rated critical and 503 rated high. Oracle E-Business Suite received the most patches at 159 (23.6%), followed by Fusion Middleware at 153, of which 78 are remotely exploitable without authentication. The CSPU is a monthly release cycle Oracle introduced in May 2026 between larger quarterly CPUs. Tenable will publish plugins to identify affected systems.
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Oracle Critical Patch Update, August 2026 Security Update Review
Oracle's August 2026 Critical Patch Update fixes 943 vulnerabilities; Oracle Fusion Middleware and Hyperion received the most patches at 262.
Oracle released its August 2026 Critical Patch Update, addressing 943 security vulnerabilities across multiple product families, including third-party components bundled in Oracle products. Oracle Fusion Middleware and Oracle Hyperion received the highest number of fixes with 262 patches. Several of the addressed vulnerabilities impact more than one product.
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Windows 11 Security Update KB5124008 Breaks Always-On VPN Connections
Microsoft's September 2026 Windows 11 update KB5124008 breaks certificate-based Always On VPN on some enterprise clients, forcing admins to pause rollout.
Microsoft's September 8, 2026 cumulative update KB5124008 for Windows 11 24H2 (build 26100.9445) and 25H2 (build 26200.9445) breaks certificate-based Always On VPN tunnels on some enterprise clients, with connectivity restored after uninstalling the update and rebooting. The issue was first detailed on Microsoft Q&A on September 9 by an administrator using Intune-deployed VPN profiles with RRAS and NPS on Windows Server 2019. The same mandatory Patch Tuesday package fixes two actively exploited zero-days, CVE-2026-81963 in the Windows Update Stack and CVE-2026-85880 in Windows Advanced Local Procedure Call, so many teams are pausing only VPN cohorts rather than blocking the full rollout.
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Microsoft Confirms Remote Desktop Services Might Stop Working Following Sept. 2026 Security Update
Microsoft's September 2026 Patch Tuesday updates (KB5124008) can break Remote Desktop Services, causing RDP failures and freezes across Windows clients and servers.
Microsoft confirmed its September 2026 security updates, including KB5124008 for Windows 11 24H2/25H2, introduced a reliability regression where RDP connections fail after several minutes and servers hang at the 'Please wait for the Remote Desktop Configuration' screen. MMC, RDS Licensing Diagnoser, File Explorer, and the Windows Update settings page may also stop responding. The issue affects Windows 10/11 clients and Windows Server 2012 through 2025; Microsoft marked it Mitigated on September 11 and is developing a permanent fix, with VM restart offered as a temporary workaround.
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Microsoft releases Windows 10 KB5122878 extended security update
Microsoft shipped Windows 10 ESU update KB5122878, delivering the record September 2026 Patch Tuesday fixes, including patches for two actively exploited zero-days.
Microsoft released KB5122878 for Windows 10 Enterprise LTSC and ESU customers, moving builds 19045/19044 to .7725 with security and bug fixes. The update carries this month's record September 2026 Patch Tuesday set, which fixed 966 Microsoft vulnerabilities including two actively exploited zero-day flaws. It also fixes BitLocker recovery-key prompts and Remote Desktop audio redirection, and updates Secure Boot certificate rollout and Morocco time zone data. Microsoft reports no known issues with the update.
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Samsung mobile security advisory (AV26-919)
Canadian Cyber Centre relays Samsung's September 2026 mobile security update (SMR-SEP-2026) fixing multiple vulnerabilities; users urged to apply patches.
The Canadian Centre for Cyber Security issued advisory AV26-919 on September 14, 2026, relaying Samsung's September 8, 2026 security update for Samsung mobile devices. The update covers versions prior to SMR-SEP-2026 and resolves multiple identified vulnerabilities. Users and administrators are encouraged to review the Samsung bulletin and apply the necessary update.
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Oracle August 2026 Critical Security Patch Update Addresses 925 CVEs
Oracle's August 2026 CSPU fixes 925 CVEs across 943 patches, including 154 critical fixes; Fusion Middleware gets 262 patches.
Oracle released its August 2026 Critical Security Patch Update on August 18, addressing 925 unique CVEs with 943 security updates. 154 issues (16.3%) carry a critical severity rating. Oracle Fusion Middleware received the most patches at 262, accounting for 27.8% of the total. Oracle introduced the monthly CSPU cycle in May 2026 as an interim release between quarterly Critical Patch Updates.
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