CVE-2023-21436

Account ID disclosure via implicit intent hijacking

Published Feb 9, 2023 · Updated Mar 24, 2025

Information disclosure in Contacts on Samsung Mobile Devices before SMR Feb-2023 Release 1 allows local users to obtain an account ID. Contacts sends account-identifying data through an implicit intent, allowing another application registered as a matching handler to receive it. Exploitation requires a malicious local application and user interaction; the documented consequence is limited to disclosure of the account ID.

CVSS severity3.3
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Contacts on Samsung Mobile Devices before SMR Feb-2023 Release 1 allows local users to obtain an account ID. Contacts sends account-identifying data through an implicit intent, allowing another application registered as a matching handler to receive it. Exploitation requires a malicious local application and user interaction; the documented consequence is limited to disclosure of the account ID.

The record

CVE
CVE-2023-21436
Published
Feb 9, 2023
Updated
Mar 24, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-285
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=Q(10), R(11), 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=Q(10), R(11), S(12), T(13) <SMR Feb-2023 Release 1

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.3Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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-285Improper Authorization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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