How severe is CVE-2021-29414?

CVE-2021-29414 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-29414 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29414?

CVE-2021-29414 affects St Stm32cubel4 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29414?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-29414 published?

CVE-2021-29414 was published on 2021-05-21 and last updated on 2026-06-17.

CVE-2021-29414

CVE-2021-29414 is a medium-severity vulnerability in St Stm32cubel4 Firmware with a CVSS 3.x base score of 6.1. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 3.6
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: St Stm32cubel4 Firmware
Published: 2021-05-21
Last modified: 2026-06-17

Description

STMicroelectronics STM32L4 devices through 2021-03-29 have incorrect physical access control.

Frequently asked questions

What is CVE-2021-29414?: STMicroelectronics STM32L4 devices through 2021-03-29 have incorrect physical access control.
How severe is CVE-2021-29414?: CVE-2021-29414 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-29414 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29414?: CVE-2021-29414 affects St Stm32cubel4 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29414?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29414 published?: CVE-2021-29414 was published on 2021-05-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:st:stm32cubel4_firmware:*:*:*:*:*:*:*:*

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