MEDIUM
CVE-2021-29414
CWE-74Published: May 21, 2021· Updated: Jun 17, 2026
6.1
CVSS v3.1
Official Description
STMicroelectronics STM32L4 devices through 2021-03-29 have incorrect physical access control.
Technical Analysis
CVE-2021-29414 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 full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.1.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected Vendors & Products
st95 product(s)
stm32cubel4 firmwarestm32l412c8stm32l412cbstm32l412k8stm32l412kbstm32l412r8stm32l412rbstm32l412t8stm32l412tbstm32l422cbstm32l422kbstm32l422rb+83
Source: NVD CPE · 95 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://eprint.iacr.org/2021/640
ADVISORYhttps://eprint.iacr.org/2021/640
All References (6)
→
https://eprint.iacr.org/2021/640Third Party Advisory
→
→
https://eprint.iacr.org/2021/640Third Party Advisory
→
Quick Facts
CVE IDCVE-2021-29414
CVSS Score6.1 / 10
SeverityMEDIUM
WeaknessCWE-74
CISA KEVNo
Affected1 vendor(s)
PublishedMay 21, 2021
Related CVEs (CWE-74)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-29414 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.COM. CVE data is provided under the NVD usage policy.