What is CVE-2019-17192?

CVE-2019-17192 is a critical-severity vulnerability in Signal Private Messenger, classified under Always-Incorrect Control Flow Implementation. CVSS score: 9.8/10. Published 2019-10-05.

How severe is CVE-2019-17192?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Signal Private Messenger

CVE-2019-17192

The WebRTC component in the Signal Private Messenger application through 4.47.7 for Android processes videoconferencing RTP packets before a callee chooses to answer a call, which might make it easier for remote attackers to cause a denial of service or possibly have unspecified other impact via malformed packets. NOTE: the vendor plans to continue this behavior for performance reasons unless a WebRTC design change occurs

Published 2019-10-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Signal Private Messenger

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

References

news.ycombinator.com/item (Third Party Advisory)
twitter.com/moxie/status/1180226374851710976 (Third Party Advisory)
bugs.chromium.org/p/project-zero/issues/detail (Third Party Advisory)

Frequently asked questions

What is CVE-2019-17192?: CVE-2019-17192 is a critical-severity vulnerability in Signal Private Messenger, classified under Always-Incorrect Control Flow Implementation. CVSS score: 9.8/10. Published 2019-10-05.
How severe is CVE-2019-17192?: Critical severity. CVSS v3 base score is 9.8 out of 10.