CVE-2023-21467 Auth bypass in Samsung Mobile Devices

Medium 4.6 Published 3 Sep 2025 Updated 3 Sep 2025

Attackers can bypass authentication in Samsung Exynos baseband firmware due to incorrect handling of unencrypted messages.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-21467?

CVE-2023-21467 is a medium-severity authentication bypass vulnerability in Samsung Mobile Devices, published on 3 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Error in 3GPP specification implementation in Exynos baseband prior to SMR Apr-2023 Release 1 allows incorrect handling of unencrypted message.

Weakness: CWE-287

Which versions are affected by CVE-2023-21467?

It affects 1 product.

Products include Samsung Exynos.

How do I fix CVE-2023-21467?

No fix has been published for CVE-2023-21467 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-2023-21467 being exploited?

There is no known exploitation of CVE-2023-21467 in the wild and no public exploit code.

Sources

Also known as GHSA-p247-9j5p-wwfc.