Security readout for executives and security teams
Plain-English summary
This flaw affects Samsung mobile devices on Android 12 or 13 before Samsung’s February 2023 SMR Release 1. Samsung describes it as improper input validation that could let an attacker launch certain activities. The rating is high because the CVSS vector indicates low-complexity local attack conditions with no privileges or user interaction.
Executive priority
Treat this as a high-priority mobile patching issue, especially for fleets with Samsung Android 12 or 13 devices handling sensitive data. No active exploitation is evidenced in the provided sources.
Technical view
CVE-2023-21439 is CWE-20 in UwbDataTxStatusEvent. The published CVSS 3.1 score is 8.5 with AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L. Sources identify Samsung Mobile Devices running S(12) and T(13) before SMR Feb-2023 Release 1 as affected.
Likely exposure
Exposure is likely limited to Samsung mobile devices on Android 12 or 13 that have not received Samsung’s February 2023 SMR Release 1 or later.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates local attack vector, no privileges, and no user interaction, but public details are limited.
Researcher notes
The public description is sparse: it names UwbDataTxStatusEvent and impact as launching certain activities, without detailed component behavior. Avoid broader product or exploit claims unless additional vendor or researcher evidence is obtained.
Mitigation direction
- Apply Samsung SMR February 2023 Release 1 or a later supported security update.
- Prioritize managed Samsung Android 12 and 13 devices missing that update.
- Retire or replace devices that cannot receive supported Samsung security updates.
- Check Samsung guidance before relying on any compensating control.
Validation and detection
- Inventory Samsung mobile devices and record OS version and security patch level.
- Confirm Android 12 and 13 devices include SMR February 2023 Release 1 or later.
- Use MDM compliance reporting to flag devices below the required patch level.
- Review Samsung’s advisory and CVE record for any later vendor clarification.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-21439 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L2.55.3Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.5HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=02CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.