CVE-2026-21124 Code injection in Samsung Mobile Devices
Local attackers can execute arbitrary code via improper input validation in the HEIF decoder library on Samsung mobile devices.
- 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-2026-21124?
CVE-2026-21124 is a high-severity code injection vulnerability in Samsung Mobile Devices, 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 input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code.
Weakness: CWE-20
Which versions are affected by CVE-2026-21124?
How do I fix CVE-2026-21124?
No fix has been published for CVE-2026-21124 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-2026-21124 being exploited?
There is no known exploitation of CVE-2026-21124 in the wild and no public exploit code.
Sources
Also known as GHSA-43vg-jj68-9cc7.