CVE-2025-20939 Missing authorization in Samsung Mobile Devices
Physical attackers can modify the device unique identifier on Samsung Galaxy Watches due to improper authorization in the wireless download protocol.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-20939?
CVE-2025-20939 is a medium-severity missing authorization vulnerability in Samsung Mobile Devices, published on 8 Apr 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 authorization in wireless download protocol in Galaxy Watch prior to SMR Apr-2025 Release 1 allows physical attackers to update device unique identifier of Watch devices.
Which versions are affected by CVE-2025-20939?
It affects 1 product.
Products include Samsung Wear Os.
How do I fix CVE-2025-20939?
No fix has been published for CVE-2025-20939 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-20939 being exploited?
There is no known exploitation of CVE-2025-20939 in the wild and no public exploit code.
Other vulnerabilities in Samsung Mobile Devices
- CVE-2025-20946 Security feature bypass in Samsung Mobile Devices
- CVE-2025-20984 Missing authorization in Samsung Mobile Devices
- CVE-2025-20997 Misconfiguration in Samsung Mobile Devices
- CVE-2025-21004 Missing authorization in Samsung Mobile Devices
- CVE-2025-20910 Missing authorization in Samsung Mobile Devices
Sources
Also known as GHSA-h477-9mjj-79jx.