CVE-2019-16256

Name: CVE-2019-16256
Creator: NVD / NIST
Published: 2019-09-12T13:15:10.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 4.95%

Last modified Jun 17, 2026

CVE-2019-16256 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Some Samsung 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 4.95% chance of exploitation in the next 30 days.

Description

Some Samsung 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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.95%

91.1th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Affected Software

Vendor	Product	Versions
Trustedconnectivityalliance	S\@T Browser	All versions

References

https://www.adaptivemobile.com/blog/simjacker-next-generation-spying-over-mobileExploit, Third Party Advisory
https://www.adaptivemobile.com/blog/simjacker-next-generation-spying-over-mobileExploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-16256US Government Resource

Timeline

Published: Sep 12, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2019-16256?

How severe is CVE-2019-16256?

CVE-2019-16256 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.95% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2019-16256?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16256?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST