CVE-2023-21473 Code injection in Samsung Mobile Devices

What is CVE-2023-21473?

CVE-2023-21473 is a medium-severity code injection vulnerability in Samsung Android, published on 3 Sep 2025. 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

Improper input validation with Exynos Fastboot USB Interface prior to SMR Apr-2023 Release 1 allows a physical attacker to execute arbitrary code in bootloader.

Weakness: CWE-20

Which versions are affected by CVE-2023-21473?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2023-21473?

No fix has been published for CVE-2023-21473 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-21473 being exploited?

There is no known exploitation of CVE-2023-21473 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-7ffh-v9f8-c5f9.