CVE-2026-21134 Auth bypass in Samsung Flow
Adjacent attackers can bypass authentication in Samsung Flow to access sensitive information, requiring users to upgrade the application.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21134?
CVE-2026-21134 is a medium-severity authentication bypass vulnerability in Samsung Flow, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper authentication in Samsung Flow prior to version 4.9.22.4 allows adjacent attackers to access sensitive information.
Weakness: CWE-287
Which versions are affected by CVE-2026-21134?
How do I fix CVE-2026-21134?
No fix has been published for CVE-2026-21134 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-2026-21134 being exploited?
There is no known exploitation of CVE-2026-21134 in the wild and no public exploit code.
Sources
Also known as GHSA-fm28-q8cf-g8mm.