CVE-2026-21031 Missing authorization in Samsung Mobile Devices

What is CVE-2026-21031?

CVE-2026-21031 is a medium-severity missing authorization vulnerability in Samsung Android, published on 5 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Improper authorization in AppBlock prior to SMR Jun-2026 Release 1 allows local attacker to launch arbitrary activity. User interaction is required for triggering this vulnerability.

Weakness: CWE-863

Which versions are affected by CVE-2026-21031?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2026-21031?

No fix has been published for CVE-2026-21031 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-21031 being exploited?

There is no known exploitation of CVE-2026-21031 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-7p4c-vmfg-g296.