CVE-2021-1836 Privilege escalation in iOS and iPadOS
A local attacker can exploit a logic issue to create or modify privileged files, leading to privilege escalation on Apple devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1836?
CVE-2021-1836 is a medium-severity vulnerability in Apple Ipados, published on 8 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A logic issue was addressed with improved restrictions. This issue is fixed in iOS 14.5 and iPadOS 14.5, tvOS 14.5. A local user may be able to create or modify privileged files.
Weakness: CWE-269
Which versions are affected by CVE-2021-1836?
It affects 3 products.
Products include Apple Ipados, Apple Iphone Os, Apple Tvos.
How do I fix CVE-2021-1836?
No fix has been published for CVE-2021-1836 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1836 being exploited?
There is no known exploitation of CVE-2021-1836 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-g464-39xh-j4rf.