CVE-2026-20991

Trial-content reuse via missing validation

Published Mar 16, 2026 · Updated Mar 16, 2026

Improper privilege management in Samsung ThemeManager before SMR Mar-2026 Release 1 allows local privileged attackers to reuse trial content. Samsung states that the patch adds validation logic but does not disclose the decision, input, or privilege check that ThemeManager previously omitted. Exploitation requires privileged local access and affects trial-content usage rather than confidentiality or service availability.

CVSS severity4.4
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Samsung ThemeManager before SMR Mar-2026 Release 1 allows local privileged attackers to reuse trial content. Samsung states that the patch adds validation logic but does not disclose the decision, input, or privilege check that ThemeManager previously omitted. Exploitation requires privileged local access and affects trial-content usage rather than confidentiality or service availability.

The record

CVE
CVE-2026-20991
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-269
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 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 privilegesadmin

What is affected?

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

Published CVSS scores

6.7Samsung MobileCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
4.4NVDCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management

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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