CVE-2019-8856 Business logic in iOS and iPadOS
Attackers can force Siri to use the wrong cellular plan for outgoing calls on dual-SIM devices, potentially causing unexpected billing or connectivity issues.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-8856?
CVE-2019-8856 is a low-severity vulnerability in Apple Ipados, published on 27 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An API issue existed in the handling of outgoing phone calls initiated with Siri. This issue was addressed with improved state handling. This issue is fixed in iOS 13.3 and iPadOS 13.3, watchOS 6.1.1, macOS Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra. Calls made using Siri may be initiated using the wrong cellular plan on devices with two active plans.
Which versions are affected by CVE-2019-8856?
It affects 4 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Watchos.
How do I fix CVE-2019-8856?
No fix has been published for CVE-2019-8856 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-8856 being exploited?
There is no known exploitation of CVE-2019-8856 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-mr2g-m2pj-f4jh.