CVE-2019-17191

7.5 highEPSS 1.8%

The Signal Private Messenger application before 4.47.7 for Android allows a caller to force a call to be answered, without callee user interaction, via a connect message. The existence of the call is noticeable to the callee; however, the audio channel may be open before the callee can block eavesdropping.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2019-10-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

signal:private_messenger

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=1943
https://news.ycombinator.com/item?id=21161432
https://twitter.com/moxie/status/1180261210341511168
https://bugs.chromium.org/p/project-zero/issues/detail?id=1943
https://news.ycombinator.com/item?id=21161432

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