CVE-2024-27834 Apple Multiple Products: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Nov 18, 2026
What to do
- Install Apple's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Apple Multiple Products Improper Authentication Vulnerability
- Product
- Apple Multiple Products
- CISA description
- Apple iOS, iPadOS, macOS, Safari, tvOS and watchOS 10.5 contain an improper authentication vulnerability which could allow an attacker with arbitrary read and write capability to bypass pointer authentication.
- Type of flaw
- Login or permission bypass (CWE-287)
- Confirmed exploited
- Nov 4, 2026
- US federal patch deadline
- Nov 18, 2026
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Answering about CVE-2024-27834 ·
Questions about CVE-2024-27834
Is CVE-2024-27834 being exploited?
Yes. CISA added CVE-2024-27834 to its Known Exploited Vulnerabilities catalog on Nov 4, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2024-27834?
Install Apple's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2024-27834?
Only if you use Apple Multiple Products. This one is aimed at devices or apps of the kind people own.