CVE-2021-31532

Exp

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.

Published: 2021-05-06 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-31532 is rated Exploit Available (53.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.14%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-31532

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-31532

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.24% 0.14% -0.09%
2 2025-03-29 0.07% 0.24% +0.16%
3 2023-03-07 — 0.07% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-31532

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2021-31532

Affected software / configurations for CVE-2021-31532

Vendor Product Version Raw CPE
nxp lpc55s69jbd100_firmware — cpe:2.3:o:nxp:lpc55s69jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc55s66jbd100_firmware — cpe:2.3:o:nxp:lpc55s66jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc55s69jev98_firmware — cpe:2.3:o:nxp:lpc55s69jev98_firmware:-:*:*:*:*:*:*:*
nxp lpcs66jev98_firmware — cpe:2.3:o:nxp:lpcs66jev98_firmware:-:*:*:*:*:*:*:*
nxp lpc55s69jbd64_firmware — cpe:2.3:o:nxp:lpc55s69jbd64_firmware:-:*:*:*:*:*:*:*
nxp lpcs66jbd64_firmware — cpe:2.3:o:nxp:lpcs66jbd64_firmware:-:*:*:*:*:*:*:*
nxp i.mx_rt500_firmware — cpe:2.3:o:nxp:i.mx_rt500_firmware:-:*:*:*:*:*:*:*
nxp i.mx_rt600_firmware — cpe:2.3:o:nxp:i.mx_rt600_firmware:-:*:*:*:*:*:*:*
nxp lpc55s28_firmware — cpe:2.3:o:nxp:lpc55s28_firmware:-:*:*:*:*:*:*:*
nxp lpc55s26_firmware — cpe:2.3:o:nxp:lpc55s26_firmware:-:*:*:*:*:*:*:*
nxp lpc5528_firmware — cpe:2.3:o:nxp:lpc5528_firmware:-:*:*:*:*:*:*:*
nxp lpc5526_firmware — cpe:2.3:o:nxp:lpc5526_firmware:-:*:*:*:*:*:*:*
nxp lpc55s16jbd100_firmware — cpe:2.3:o:nxp:lpc55s16jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc55s16jev98_firmware — cpe:2.3:o:nxp:lpc55s16jev98_firmware:-:*:*:*:*:*:*:*
nxp lpc55s16jbd64_firmware — cpe:2.3:o:nxp:lpc55s16jbd64_firmware:-:*:*:*:*:*:*:*
nxp lpc55s14jbd100_firmware — cpe:2.3:o:nxp:lpc55s14jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc55s14jbd64_firmware — cpe:2.3:o:nxp:lpc55s14jbd64_firmware:-:*:*:*:*:*:*:*
nxp lpc5516jbd100_firmware — cpe:2.3:o:nxp:lpc5516jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc5516jev98_firmware — cpe:2.3:o:nxp:lpc5516jev98_firmware:-:*:*:*:*:*:*:*
nxp lpc5516jbd64_firmware — cpe:2.3:o:nxp:lpc5516jbd64_firmware:-:*:*:*:*:*:*:*
nxp lpc5514jbd100_firmware — cpe:2.3:o:nxp:lpc5514jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc5514jbd64_firmware — cpe:2.3:o:nxp:lpc5514jbd64_firmware:-:*:*:*:*:*:*:*
nxp lpc5512jbd100_firmware — cpe:2.3:o:nxp:lpc5512jbd100_firmware:-:*:*:*:*:*:*:*
nxp lpc5512jbd64_firmware — cpe:2.3:o:nxp:lpc5512jbd64_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-31532

URL Tags
https://oxide.computer/blog/lpc55/ Exploit Third Party Advisory
https://www.nxp.com Vendor Advisory
cvelogic Threat Intelligence