How severe is CVE-2019-16256?

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

Is CVE-2019-16256 known to be exploited?

Yes. CVE-2019-16256 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Vulnerability in Trustedconnectivityalliance S\@t Browser

CVE-2019-16256

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.

EPSS: 0.049 (91.6th percentile) — read the EPSS interpretation.

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.

Affected products

Trustedconnectivityalliance S\@t_browser
N/a — versions n/a

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2019-16256?: CVE-2019-16256 is a critical-severity vulnerability in Trustedconnectivityalliance S\@t Browser. CVSS score: 9.8/10. Published 2019-09-12.
How severe is CVE-2019-16256?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-16256 known to be exploited?: Yes. CVE-2019-16256 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.