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CVE-2026-65400 is an improper authentication vulnerability in Apple macOS Screen Sharing. Apple states the issue was caused by an authentication flaw addressed through improved state management. Available technical analysis ties the bug to flawed authentication-state handling in the screensharingd service, reportedly in the Secure Remote Password (SRP) path, where malformed or specially ordered network input could leave a stale authenticated state and cause the service to accept a connection without valid credentials. On affected systems, successful exploitation can grant unauthorized access to the built-in remote desktop service. Multiple reports indicate the resulting access can extend beyond simple session establishment because Screen Sharing operates with high privileges and can expose privileged file-transfer helpers, enabling arbitrary file access as root and creating paths to full system compromise.
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118 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authentication bypass vulnerability in Apple macOS Screen Sharing that allows attackers to authenticate without valid credentials, obtain root access, and install a cryptominer on exposed systems.
An authentication-bypass vulnerability in Apple's macOS Screen Sharing feature that allows a network-adjacent attacker to connect without valid credentials, potentially leading to remote control of the Mac and root-level compromise.
A high-severity authentication bypass vulnerability in macOS Screen Sharing that allows remote attackers to authenticate without valid credentials and gain unauthorized access, with reported post-exploitation leading to root access and Monero miner deployment.
A critical remote code execution vulnerability in Apple macOS Screen Sharing that can be triggered via crafted network packets and has been weaponized to compromise exposed systems.
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.