CVE-2026-21098 Auth bypass in Samsung Mobile Devices

What is CVE-2026-21098?

CVE-2026-21098 is a medium-severity authentication bypass vulnerability in Samsung Android, published on 9 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper access control in Link to Windows prior to SMR Sep-2026 Release 1 allows local attackers to establish a connection with the PC without proper user interaction.

Weakness: CWE-284

Which versions are affected by CVE-2026-21098?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2026-21098?

No fix has been published for CVE-2026-21098 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-21098 being exploited?

There is no known exploitation of CVE-2026-21098 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-jw2g-r66f-48g3.