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CVE Record

CVE-2021-34393: Trusty contains a vulnerability in TSEC TA which deserializes the incoming messages even though the TSEC TA...

Trusty contains a vulnerability in TSEC TA which deserializes the incoming messages even though the TSEC TA does not expose any command. This vulnerability might allow an attacker to exploit the deserializer to impact code execution, causing information disclosure.

MediumCVSS 4.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects specific NVIDIA Jetson devices running Jetson Linux before r32.5.1. A flaw in a trusted execution component may let a highly privileged local attacker trigger unsafe message parsing, potentially exposing sensitive information. It is not listed as known exploited in KEV.

Executive priority

Treat as a targeted remediation item, not an emergency internet-wide event. Prioritize affected Jetson deployments with sensitive workloads, shared access, or weaker local controls, and align upgrades with operational maintenance windows.

Technical view

Trusty TSEC TA deserializes incoming messages despite not exposing commands. The published CVSS vector is local attack, low complexity, high privileges required, user interaction required, unchanged scope, and high confidentiality impact. Sources describe possible code execution impact leading to information disclosure.

Likely exposure

Exposure is limited to NVIDIA Jetson TX2 series, TX2 NX, AGX Xavier series, and Xavier NX on Jetson Linux versions earlier than r32.5.1.

Exploitation context

The available sources do not report active exploitation or public weaponization. The CVSS vector indicates exploitation requires local access, high privileges, and user interaction, reducing broad internet-facing risk but leaving embedded or shared-device environments exposed.

Researcher notes

Key evidence is concise: affected product range, fixed-version threshold, CVSS vector, and vulnerability class. Sources do not provide CWE, exploit details, detection indicators, or deeper root-cause material, so validation should stay version and vendor-advisory driven.

Mitigation direction

  • Upgrade affected Jetson systems to Jetson Linux r32.5.1 or later.
  • Review NVIDIA advisory guidance before production remediation.
  • Restrict local administrative access to Jetson devices.
  • Prioritize devices handling sensitive data or shared by multiple users.
  • Include Jetson firmware and OS versions in asset inventory.

Validation and detection

  • Identify Jetson model and Jetson Linux release on each device.
  • Confirm affected models are not running versions earlier than r32.5.1.
  • Verify remediation against NVIDIA advisory details.
  • Review local privilege boundaries and administrative user access.
  • Check vulnerability management records for all Jetson assets.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-34393 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.2CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N0.63.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.2Medium
CVSS 3.1 vector shape for CVE-2021-34393Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
NVIDIANVIDIA Jetson TX2 series, TX2 NX, AGX Xavier series, Xavier NXAll Jetson Linux versions prior to r32.5.1Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.