How severe is CVE-2019-14236?

CVE-2019-14236 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-14236 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-14236?

CVE-2019-14236 primarily affects St Stm32l0 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-14236?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-14236 published?

CVE-2019-14236 was published on 2019-09-12 and last updated on 2026-06-17.

CVE-2019-14236

CVE-2019-14236 is a critical-severity vulnerability in St Stm32l0 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: St Stm32l0 Firmware
Published: 2019-09-12
Last modified: 2026-06-17

Description

On STMicroelectronics STM32L0, STM32L1, STM32L4, STM32F4, STM32F7, and STM32H7 devices, Proprietary Code Read Out Protection (PCROP) (a software IP protection method) can be defeated by observing CPU registers and the effect of code/instruction execution.

Frequently asked questions

What is CVE-2019-14236?: On STMicroelectronics STM32L0, STM32L1, STM32L4, STM32F4, STM32F7, and STM32H7 devices, Proprietary Code Read Out Protection (PCROP) (a software IP protection method) can be defeated by observing CPU registers and the effect of code/instruction execution.
How severe is CVE-2019-14236?: CVE-2019-14236 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-14236 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-14236?: CVE-2019-14236 primarily affects St Stm32l0 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-14236?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-14236 published?: CVE-2019-14236 was published on 2019-09-12 and last updated on 2026-06-17.

References

https://www.usenix.org/system/files/woot19-paper_schink.pdf

Affected products (6)

cpe:2.3:o:st:stm32l0_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:st:stm32l1_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:st:stm32f4_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:st:stm32l4_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:st:stm32f7_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:st:stm32h7_firmware:-:*:*:*:*:*:*:*

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