Samsung Mobile Devices Improper Access Control Vulnerability (CVE-2021-25337)

Samsung mobile devices contain an improper access control vulnerability in clipboard service which allows untrusted applications to read or write arbitrary files. This vulnerability was chained with CVE-2021-25369 and CVE-2021-25370.

Published Mar 4, 2021 · Updated May 17, 2026

Why patchRisk explained in plain English

Worst-case scenarioIf unpatched

A local attacker, without authentication, can achieve partial data exposure, partial data tampering. Federal agencies are required to remediate by 2022-11-29 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Improper Privilege Management (CWE-269) vulnerability in Samsung Mobile Devices. Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files. Exploitation requires local access, low attack complexity, no authentication required, and user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security

●Running android: 9.0, 10.0, 11.0

Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-11-08 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-11-29.

How to patch

Manual remediation steps

Identify affected hosts: query inventory for general installs in scope.

Apply the vendor security update referenced in CVE-2021-25337's advisory. No specific KB/version is encoded yet — consult the linked MSRC/vendor URL.

Verify the fix per the vendor's published verification steps.

Document the remediation in your change ticket and re-scan with your vulnerability scanner to confirm closure.

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2021-25337 ↗ MSRC Advisory ↗ NVD ↗ Vendor Advisory