CVE-2021-1756 Information disclosure in iOS and iPadOS
An attacker with physical access can view private contacts on a locked device due to a lock screen state management flaw.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1756?
CVE-2021-1756 is a low-severity vulnerability in Apple Ipados, published on 2 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management. This issue is fixed in iOS 14.4 and iPadOS 14.4. An attacker with physical access to a device may be able to see private contact information.
Which versions are affected by CVE-2021-1756?
It affects 2 products.
Products include Apple Ipados, Apple Iphone Os.
How do I fix CVE-2021-1756?
No fix has been published for CVE-2021-1756 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1756 being exploited?
There is no known exploitation of CVE-2021-1756 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-jwfc-mm78-xqm4.