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Apple Updates Everything, (Mon, Sep 14th)

Apple patched a record 261 vulnerabilities across iOS 27, macOS Golden Gate 27, watchOS 27, and other platforms, with none flagged as exploited.

Apple's annual OS update shipped iOS/iPadOS 27, macOS Golden Gate 27, tvOS 27, watchOS 27, and visionOS 27 plus bug-fix releases for the 26 and 15 branches, fixing a record 261 vulnerabilities. Notable issues include multiple kernel flaws allowing root privilege escalation (CVE-2026-43689, CVE-2026-43691, CVE-2026-43698, CVE-2026-43786), remote code execution in CUPS (CVE-2026-43692), kernel memory corruption via malicious NFS servers (CVE-2026-43686, CVE-2026-43687), and WebKit memory corruption from crafted web content (CVE-2026-43715). No vulnerabilities are labeled as actively exploited, and Apple does not assign per-CVE severities. Users report iOS 26.7 being downloaded when iOS 27 is intended, and tools like Little Snitch and BlockBlock need updates before upgrading to macOS 27.

ZDI-26-610: Apple Safari JavaScriptCore B3 ReduceStrength Phase Use-After-Free Remote Code Execution Vulnerability

ZDI details a use-after-free in Apple Safari's JavaScriptCore (CVE-2026-64715) that allows remote code execution after a user visits a malicious page.

The Zero Day Initiative published advisory ZDI-26-610 for a use-after-free in the B3 ReduceStrength phase of Apple Safari's JavaScriptCore. Successful exploitation allows remote attackers to execute arbitrary code, but user interaction is required, such as visiting a malicious page or opening a malicious file. ZDI rates the vulnerability 8.8 on CVSS and assigned CVE-2026-64715. The advisory does not report exploitation in the wild.