CVE-2026-43692

CVE-2026-43692 is an input validation and sanitization weakness in Apple's macOS that allows a remote attacker to cause unexpected application termination or execute arbitrary code on an affected Mac. The exact component and attack vector were not specified in the advisory, but flaws of this class are typically triggered by tricking a target into processing maliciously crafted content or input, and exploitation would let an attacker crash apps or run code in the context of the vulnerable process. All Macs running macOS Sequoia before 15.8, macOS Tahoe before 26.7, or macOS Golden Gate before 27 are affected; Apple patched the issue in those releases, which shipped alongside the company's broad September security updates. The vulnerability has no CVSS score yet, no public proof-of-concept is known, and it is not listed in CISA's Known Exploited Vulnerabilities catalog, indicating no observed in-the-wild exploitation at this time.

What to do: Update affected Macs immediately to macOS Sequoia 15.8, macOS Tahoe 26.7, or macOS Golden Gate 27 (or later) via System Settings > Software Update, and prioritize the update in MDM/patch management since arbitrary code execution flaws in macOS are prime targets once details emerge. There is no published workaround, so patching is the primary mitigation. After patching, monitor Apple's security advisory and threat intel feeds for the affected component and any emerging exploitation before this CVE receives a CVSS score.