HIGH
CVE-2021-36133
CWE-732Published: December 7, 2021· Updated: Jun 17, 2026
7.1
CVSS v3.1
Official Description
The OPTEE-OS CSU driver for NXP i.MX SoC devices lacks security access configuration for several models, resulting in TrustZone bypass because the NonSecure World can perform arbitrary memory read/write operations on Secure World memory. This involves a DMA capable peripheral.
Technical Analysis
CVE-2021-36133 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.1.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected Vendors & Products
nxp6 product(s)
i.mx 6i.mx 6soloxi.mx 6ulli.mx 6ulzi.mx 7dsi.mx6sx
trustedfirmware1 product(s)
op-tee
Source: NVD CPE · 7 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
All References (2)
→
Quick Facts
CVE IDCVE-2021-36133
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-732
CISA KEVNo
Affected2 vendor(s)
PublishedDec 7, 2021
Related CVEs (CWE-732)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-36133 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.