CVE-2021-31532

moderate-risk
Published 2021-05-06

NXP LPC55S6x microcontrollers (0A and 1B), i.MX RT500 (silicon rev B1 and B2), i.MX RT600 (silicon rev A0, B0), LPC55S6x, LPC55S2x, LPC552x (silicon rev 0A, 1B), LPC55S1x, LPC551x (silicon rev 0A) and LPC55S0x, LPC550x (silicon rev 0A) include an undocumented ROM patch peripheral that allows unsigned, non-persistent modification of the internal ROM.

Do I need to act?

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0.14% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.8/10 Medium
PHYSICAL / LOW complexity

Affected Products (20)

Lpc55S69Jbd100 Firmware
Lpc55S66Jbd100 Firmware
Lpc55S69Jev98 Firmware
Lpcs66Jev98 Firmware
Lpc55S69Jbd64 Firmware
Lpcs66Jbd64 Firmware
I.Mx Rt500 Firmware
I.Mx Rt600 Firmware
Lpc55S28 Firmware
Lpc55S26 Firmware
Lpc5528 Firmware
Lpc5526 Firmware
Lpc55S16Jbd100 Firmware
Lpc55S16Jev98 Firmware
Lpc55S16Jbd64 Firmware
Lpc55S14Jbd100 Firmware
Lpc55S14Jbd64 Firmware
Lpc5516Jbd100 Firmware
Lpc5516Jev98 Firmware
Lpc5516Jbd64 Firmware

Affected Vendors

Nxp

References (4)

Exploit https://oxide.computer/blog/lpc55/
Vendor Advisory https://www.nxp.com
Exploit https://oxide.computer/blog/lpc55/
Vendor Advisory https://www.nxp.com
44
/ 100
moderate-risk
Severity 22/34 · High
Exploitability 1/34 · Minimal
Exposure 21/34 · High