CVE-2026-21023

Installation restriction bypass via unverified authenticity data

Published Apr 29, 2026 · Updated Apr 29, 2026

Improper authenticity verification in Samsung Mobile Devices lets local attackers alter application installation restrictions. Samsung has not disclosed which authenticity data PackageManagerService fails to verify or how that data reaches the restriction logic. The flaw affects Android 14, 15, and 16 before SMR Mar-2026 Release 1; local access is required, and the impact is limited to changing an installation restriction.

CVSS severity6.9
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authenticity verification in Samsung Mobile Devices lets local attackers alter application installation restrictions. Samsung has not disclosed which authenticity data PackageManagerService fails to verify or how that data reaches the restriction logic. The flaw affects Android 14, 15, and 16 before SMR Mar-2026 Release 1; local access is required, and the impact is limited to changing an installation restriction.

The record

CVE
CVE-2026-21023
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

6.9Samsung MobileCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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