CVE-2026-20999 Auth bypass in Smart Switch

High 7.1 Published 16 Mar 2026 Updated 16 Mar 2026

Remote attackers can bypass authentication via replay attacks to trigger privileged functions in Samsung Smart Switch.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-20999?

CVE-2026-20999 is a high-severity authentication bypass vulnerability in Samsung Mobile Smart Switch, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Authentication bypass by replay in Smart Switch prior to version 3.7.69.15 allows remote attackers to trigger privileged functions.

Weakness: CWE-294

Which versions are affected by CVE-2026-20999?

It affects 1 product.

Products include Samsung Smart Switch.

How do I fix CVE-2026-20999?

No fix has been published for CVE-2026-20999 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-2026-20999 being exploited?

There is no known exploitation of CVE-2026-20999 in the wild and no public exploit code.

Sources

Also known as GHSA-5pp6-8jj7-4q6q.