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September 2026 Patch Tuesday roundup: Plugs for two zero day holes among almost 1,000 fixes in Windows
Microsoft's September 2026 Patch Tuesday ships 964 fixes including two exploited Windows zero-days (CVE-2026-85880, CVE-2026-81963) and a wormable DNS RCE.
Microsoft's September 2026 Patch Tuesday includes 964 Microsoft vulnerabilities requiring customer action, a record attributed to AI-assisted bug discovery, plus 174 third-party/open-source and 23 Chromium/Edge CVEs. Two zero-days are exploited in the wild: CVE-2026-85880, a Windows ALPC heap overflow enabling AppContainer sandbox escape and privilege escalation, and CVE-2026-81963, a Windows Update Stack escalation to SYSTEM. CVE-2026-69730, an unauthenticated Windows DNS RCE, is not yet exploited but Microsoft expects exploitation, and roughly 20 bugs could be wormable. Separately, SAP issued a critical CVSS 10.0 fix for the EPP component used in S/4HANA and NetWeaver.
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Ivanti, Fortinet, and SAP Release Patches for Multiple Critical Vulnerabilities
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SAP Commerce Cloud Flaw Could Let Unauthenticated Attackers Execute Arbitrary Code
SAP patched a CVSS 10.0 unauthenticated RCE flaw (CVE-2026-58231) in Commerce Cloud's Data Hub Adapter, plus three critical flaws in NetWeaver and Manufacturing.
SAP's August 2026 updates fix CVE-2026-58231, a CVSS 10.0 flaw in Commerce Cloud's Data Hub Adapter where insufficient authorization checks and input validation let unauthenticated attackers execute arbitrary code. Onapsis urged customers to patch and redeploy, with an IP Filter Set on the vulnerable endpoint offered as a temporary workaround. The update also fixed CVE-2026-44772 (CVSS 9.9) and CVE-2026-44758 (CVSS 9.1), code injection flaws in Manufacturing Integration and Intelligence involving SSRF and SSTI, and CVE-2026-34265 (CVSS 9.8), an out-of-bounds write in NetWeaver ABAP's DIAG protocol parsing that can leak information or crash systems.
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SAP Patches Critical NetWeaver (CVSS Up to 10.0) and High
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Microsoft, Adobe, SAP deliver critical fixes for September 2025 Patch Tuesday
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