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CVE-2026-20699 is a downgrade issue in AppleMobileFileIntegrity affecting Intel-based Mac computers. Apple states that the flaw could allow an app to access user-sensitive data. The issue was addressed by adding additional code-signing restrictions, indicating that insufficient enforcement around code-signing and version/downgrade handling allowed an application to leverage an older or less-restricted state to bypass intended protections. Apple lists this issue as affecting macOS Sequoia, macOS Sonoma, and macOS Tahoe on Intel-based systems.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.