值得注意的是，工信部门9月10日曾预警iOS 18.6.2存在越界写入高危漏洞，该漏洞已被用于网络攻击。 苹果表示此举旨在推动用户使用修复漏洞的新版本。虽然用户可自主选择继续使用iOS 18系列，但升级 至iOS 26后将失去降级选项，专家建议用户升级前做好数据备份，权衡新功能与系统兼容性需求。 苹果于8月21日推送iOS18.6.2维护性更新，聚焦系统稳定性优化。而iOS 26正式版于9月16日发布，采用 全新"Liquid Glass"设计语言，是苹果首次统一全平台版本号的系统革新。此次停止旧版本签名延续了 苹果惯例——在新安全更新发布后终止旧版本支持。 9月23日晚间，有媒体爆料称，苹果已正式停止对iOS 18.6.2及更早版本的签名验证，同步停止签署的还 包括iPadOS 18.6.2和tvOS 18.6。这意味着用户设备一旦升级至iOS 26系统，将无法通过恢复模式降级回 iOS 18系列版本。 ...

Core Viewpoint - Apple has urgently released iOS 18.6.2 update to address a critical security vulnerability affecting various devices, highlighting the increasing concern over electronic device security in the digital age [1][4] Group 1: Security Vulnerability - The vulnerability affects iPhone XS and later models, multiple iPad Pro, iPad Air, iPad, and iPad mini devices [4] - The issue arises from processing malicious image files, which can lead to memory corruption and allow hackers to execute attacks [4] Group 2: Software Updates - In addition to iOS 18.6.2, Apple has also released updates for iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, and macOS Ventura 13.7.8, all aimed at fixing the ImageIO vulnerability [4] - Apple recommends users to update their devices immediately due to the active exploitation of this vulnerability in the wild [4]