Actively exploited Mac screen-sharing flaw prompts update warning
A serious macOS screen-sharing vulnerability has been exploited in the wild, according to four technology outlets citing the Netherlands' National Cyber Security Center. The flaw can let attackers view screens and open files. Apple issued fixes for Tahoe, Sequoia and Sonoma, while users are advised to disable screen sharing when it is not needed.
Why it matters
Active exploitation turns a software defect into an immediate security risk for Macs with screen sharing enabled.
Sources
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Part of the August 18, 2026 brief.