CVE-2021-1854 Security feature bypass in iOS and iPadOS
A legacy cellular network can automatically answer incoming calls when an ongoing call ends, bypassing user consent on iOS and iPadOS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-1854?
CVE-2021-1854 is a medium-severity vulnerability in Apple Ipados, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A call termination issue with was addressed with improved logic. This issue is fixed in iOS 14.5 and iPadOS 14.5. A legacy cellular network can automatically answer an incoming call when an ongoing call ends or drops. .
Weakness: CWE-863
Which versions are affected by CVE-2021-1854?
It affects 2 products.
Products include Apple Ipados, Apple Iphone Os.
How do I fix CVE-2021-1854?
No fix has been published for CVE-2021-1854 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1854 being exploited?
There is no known exploitation of CVE-2021-1854 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-2356-6r88-539v.