What’s Vulnerable › Vulnerabilities

CVE-2020-27212

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-21 · updated 2026-06-17
• Weakness: CWE-74

Description

STMicroelectronics STM32L4 devices through 2020-10-19 have incorrect access control. The flash read-out protection (RDP) can be degraded from RDP level 2 (no access via debug interface) to level 1 (limited access via debug interface) by injecting a fault during the boot phase.

Affected products

• Stm32Cubel4 Firmware: through 1.16.0

References

• https://eprint.iacr.org/2021/640
• https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
• https://www.aisec.fraunhofer.de/en/FirmwareProtection.html
• https://eprint.iacr.org/2021/640
• https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
• https://www.aisec.fraunhofer.de/en/FirmwareProtection.html

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