CVE-2021-1837 Security feature bypass in iOS and iPadOS
An attacker in a privileged network position can bypass certificate validation to alter network traffic on iOS and iPadOS devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1837?
CVE-2021-1837 is a medium-severity vulnerability in Apple Ipados, published on 8 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A certificate validation issue was addressed. This issue is fixed in iOS 14.5 and iPadOS 14.5. An attacker in a privileged network position may be able to alter network traffic.
Weakness: CWE-295
Which versions are affected by CVE-2021-1837?
It affects 2 products.
Products include Apple Ipados, Apple Iphone Os.
How do I fix CVE-2021-1837?
No fix has been published for CVE-2021-1837 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1837 being exploited?
There is no known exploitation of CVE-2021-1837 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-75hp-fjj5-wjf4.