CVE-2026-20991 Privilege escalation in Samsung Mobile Devices

What is CVE-2026-20991?

CVE-2026-20991 is a medium-severity vulnerability in Samsung Android, published on 16 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

Which versions are affected by CVE-2026-20991?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2026-20991?

No fix has been published for CVE-2026-20991 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20991 being exploited?

There is no known exploitation of CVE-2026-20991 in the wild and no public exploit code.

Other vulnerabilities in Samsung Android

• CVE-2025-21042 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2025-21043 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2021-25487 Samsung Mobile Devices Out-of-Bounds Read Exploited High 7.3
• CVE-2021-25394 Samsung Mobile Devices Race Condition Exploited Medium 6.4
• CVE-2021-25395 Samsung Mobile Devices Race Condition Exploited Medium 6.4

All Samsung Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-vpvf-7jf8-3gpw.