CVE-2019-14238

Exp

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.

Published: 2019-09-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-14238 is rated Exploit Available (52.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.40%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-14238

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-14238

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.40% +0.34%
2 2025-03-17 0.05% 0.07% +0.02%
3 2023-03-07 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-14238

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.6 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.7 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2019-14238

Affected software / configurations for CVE-2019-14238

Vendor Product Version Raw CPE
st stm32l0_firmware — cpe:2.3:o:st:stm32l0_firmware:-:*:*:*:*:*:*:*
st stm32l1_firmware — cpe:2.3:o:st:stm32l1_firmware:-:*:*:*:*:*:*:*
st stm32f4_firmware — cpe:2.3:o:st:stm32f4_firmware:-:*:*:*:*:*:*:*
st stm32l4_firmware — cpe:2.3:o:st:stm32l4_firmware:-:*:*:*:*:*:*:*
st stm32f7_firmware — cpe:2.3:o:st:stm32f7_firmware:-:*:*:*:*:*:*:*
st stm32h7_firmware — cpe:2.3:o:st:stm32h7_firmware:-:*:*:*:*:*:*:*

References for CVE-2019-14238

URL Tags
https://www.usenix.org/conference/woot19/presentation/schink Exploit Third Party Advisory
https://www.usenix.org/system/files/woot19-paper_schink.pdf Exploit Mitigation Third Party Advisory
cvelogic Threat Intelligence