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Samsung Mobile Devices CVE-2026-20991

| EUVDEUVD-2026-12299 MEDIUM
2026-03-16 SamsungMobile
4.4
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.4 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

3
EUVD ID Assigned
Mar 16, 2026 - 05:00 euvd
EUVD-2026-12299
Analysis Generated
Mar 16, 2026 - 05:00 vuln.today
CVE Published
Mar 16, 2026 - 04:31 nvd
MEDIUM 4.4

DescriptionCVE.org

Improper privilege management in ThemeManager prior to SMR Mar-2026 Release 1 allows local privileged attackers to reuse trial contents.

AnalysisAI

ThemeManager prior to the SMR Mar-2026 Release 1 contains an improper privilege management vulnerability that allows local privileged attackers to inappropriately reuse trial contents, potentially circumventing licensing restrictions or trial period limitations. With a CVSS score of 6.7 and requiring high privileges (PR:H) but no user interaction, this vulnerability poses a moderate integrity risk in environments where multiple privileged users share access to ThemeManager systems. No public proof-of-concept or active exploitation has been reported in the CVE record, and this does not appear on CISA's KEV catalog, suggesting limited real-world weaponization at present.

Technical ContextAI

ThemeManager is a theme management system component, likely bundled within Samsung Mobile Release (SMR) updates or a broader Samsung product suite. The vulnerability stems from improper privilege management mechanisms that fail to adequately enforce separation of trial license states and content reuse policies. The root cause relates to inadequate access controls or permission validation when privileged actors attempt to access or reuse trial-licensed content. While no explicit CWE is mapped in the CVE record, this pattern typically aligns with CWE-269 (Improper Access Control - Generic) or CWE-276 (Incorrect Default Permissions). The flaw exists at the application or service level within ThemeManager's privilege boundary, allowing local high-privileged users (e.g., root, system administrators) to bypass or reset trial content restrictions that should persist regardless of privilege level.

RemediationAI

Upgrade ThemeManager to SMR Mar-2026 Release 1 or any later security maintenance release from Samsung. This patch directly addresses the privilege management flaw and should be applied immediately to all systems running vulnerable versions. Until patching is feasible, restrict administrative or high-privilege account access to ThemeManager to trusted personnel only, and audit activity logs for suspicious trial content reuse patterns. If ThemeManager operates in a multi-user environment, enforce additional access controls at the operating system level to limit which accounts can invoke ThemeManager functions. For cloud or virtualized deployments, isolate ThemeManager instances to reduce the privilege attack surface. Reference Samsung's official security advisory and patch release notes at https://security.samsungmobile.com for comprehensive update guidance and deployment recommendations.

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CVE-2026-20991 vulnerability details – vuln.today

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