CVE-2026-21078 Auth bypass in Smart Switch
Adjacent attackers can spoof device identity in Smart Switch trouble scanning mode due to insufficient data authenticity verification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21078?
CVE-2026-21078 is a medium-severity authentication bypass vulnerability in Samsung Mobile Smart Switch, published on 10 Aug 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
Insufficient verification of data authenticity in Smart Switch trouble scanning mode prior to version 3.7.72.6 allows adjacent attackers to spoof device identity.
Weakness: CWE-345
Which versions are affected by CVE-2026-21078?
It affects 1 product.
Products include Samsung Smart Switch.
How do I fix CVE-2026-21078?
No fix has been published for CVE-2026-21078 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-2026-21078 being exploited?
There is no known exploitation of CVE-2026-21078 in the wild and no public exploit code.
Other vulnerabilities in Samsung Mobile Smart Switch
Sources
Also known as GHSA-42p3-wxq8-fc66.