What is CVE-2019-14238?

CVE-2019-14238 is a medium-severity vulnerability in St Stm32f4, classified under Improper Authentication. CVSS score: 6.6/10. Published 2019-09-24.

How severe is CVE-2019-14238?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Auth bypass in St Stm32f4

CVE-2019-14238

On STMicroelectronics STM32F7 devices, Proprietary Code Read Out Protection (PCROP) (a software IP protection method) can be defeated with a debug probe via the Instruction Tightly Coupled Memory (ITCM) bus.

Vulnerability class: Broken Authentication

Published 2019-09-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.usenix.org/system/files/woot19-paper_schink.pdf (Exploit, Third Party Advisory, Mitigation)
www.usenix.org/conference/woot19/presentation/schink (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-14238?: CVE-2019-14238 is a medium-severity vulnerability in St Stm32f4, classified under Improper Authentication. CVSS score: 6.6/10. Published 2019-09-24.
How severe is CVE-2019-14238?: Medium severity. CVSS v3 base score is 6.6 out of 10.