HOMEVULNERABILITIESCVE-2021-31532
MEDIUM

CVE-2021-31532

NVD-CWE-OtherPublished: May 6, 2021· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-31532 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

nxp48 product(s)
lpc55s69jbd100 firmwarelpc55s69jbd100lpc55s66jbd100 firmwarelpc55s66jbd100lpc55s69jev98 firmwarelpc55s69jev98lpcs66jev98 firmwarelpcs66jev98lpc55s69jbd64 firmwarelpc55s69jbd64lpcs66jbd64 firmwarelpcs66jbd64+36
Source: NVD CPE · 60 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://oxide.computer/blog/lpc55/
ADVISORYhttps://www.nxp.com
ADVISORYhttps://oxide.computer/blog/lpc55/
ADVISORYhttps://www.nxp.com

All References (4)

→
https://oxide.computer/blog/lpc55/Exploit · Third Party Advisory
→
https://www.nxp.comVendor Advisory
→
https://oxide.computer/blog/lpc55/Exploit · Third Party Advisory
→
https://www.nxp.comVendor Advisory

Quick Facts

CVE IDCVE-2021-31532
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedMay 6, 2021

Related CVEs (NVD-CWE-Other)

CVE-2022-4390
10.0
CVE-2006-6355
10.0
CVE-2006-1123
10.0
CVE-2007-1021
10.0
CVE-2007-1024
10.0
CVE-2004-0354
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-31532 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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