What is CVE-2019-16257?

CVE-2019-16257 is a critical-severity vulnerability in Motorola. CVSS score: 9.8/10. Published 2019-09-12.

How severe is CVE-2019-16257?

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

Vulnerability in Motorola

CVE-2019-16257

Some Motorola devices include the SIMalliance Toolbox Browser (aka S@T Browser) on the UICC, which might allow remote attackers to retrieve location and IMEI information, or retrieve other data or execute certain commands, via SIM Toolkit (STK) instructions in an SMS message, aka Simjacker.

Published 2019-09-12 · 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: 0.021 (80.9th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

References

www.adaptivemobile.com/blog/simjacker-next-generation-spying-over-mobile (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16257?: CVE-2019-16257 is a critical-severity vulnerability in Motorola. CVSS score: 9.8/10. Published 2019-09-12.
How severe is CVE-2019-16257?: Critical severity. CVSS v3 base score is 9.8 out of 10.