What’s Vulnerable › Vulnerabilities

CVE-2021-40154

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-01 · updated 2026-06-17
• Weakness: CWE-125

Description

NXP LPC55S69 devices before A3 have a buffer over-read via a crafted wlength value in a GET Descriptor Configuration request during use of USB In-System Programming (ISP) mode. This discloses protected flash memory.

Affected products

• NXP Lpc55S69Jbd100 Firmware: all versions
• NXP Lpc55S69Jbd64 Firmware: all versions
• NXP Lpc55S69Jev98 Firmware: all versions

References

• https://github.com/Xen1thLabs-AE/CVE-2021-40154
• https://www.darkmatter.ae/xen1thlabs/published-advisories/
• https://github.com/Xen1thLabs-AE/CVE-2021-40154
• https://www.darkmatter.ae/xen1thlabs/published-advisories/

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