CVE-2023-21439

Local privilege escalation via unvalidated UWB event

Published Feb 9, 2023 · Updated Mar 24, 2025

Improper input validation in UwbDataTxStatusEvent on Samsung Mobile Devices before SMR Feb-2023 Release 1 allows local users to elevate privileges. Samsung has not disclosed which event fields UwbDataTxStatusEvent accepts without validation or which privileged activity they select. The attack originates locally, requires no existing privileges or user interaction, and crosses a security boundary to launch privileged activities.

CVSS severity8.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in UwbDataTxStatusEvent on Samsung Mobile Devices before SMR Feb-2023 Release 1 allows local users to elevate privileges. Samsung has not disclosed which event fields UwbDataTxStatusEvent accepts without validation or which privileged activity they select. The attack originates locally, requires no existing privileges or user interaction, and crosses a security boundary to launch privileged activities.

The record

CVE
CVE-2023-21439
Published
Feb 9, 2023
Updated
Mar 24, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-20, T1404
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=S(12), T(13) <SMR Feb-2023 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=S(12), T(13) <SMR Feb-2023 Release 1

Published CVSS scores

8.5Samsung Mobile SecurityCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1404Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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