CVE-2019-17191
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.75% probability · 78th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- signal/private messenger
- Source
- cve@mitre.org
EPSS 1.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1943Exploit, Third Party Advisory
- https://news.ycombinator.com/item?id=21161432Exploit, Issue Tracking, Third Party Advisory
- https://twitter.com/moxie/status/1180261210341511168Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1943Exploit, Third Party Advisory
- https://news.ycombinator.com/item?id=21161432Exploit, Issue Tracking, Third Party Advisory
- https://twitter.com/moxie/status/1180261210341511168Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.