CVE-2025-66369 Denial of service in n/a
Attackers can cause a Denial of Service in Samsung Exynos modems by sending malformed 5G NR NAS registration accept messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66369?
CVE-2025-66369 is a high-severity denial of service vulnerability in n/a, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in MM in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, W920, W930, W1000, Modem 5123, and Modem 5300. Incorrect handling of 5G NR NAS registration accept messages leads to a Denial of Service.
Weakness: CWE-770
Which versions are affected by CVE-2025-66369?
How do I fix CVE-2025-66369?
No fix has been published for CVE-2025-66369 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-66369 being exploited?
There is no known exploitation of CVE-2025-66369 in the wild and no public exploit code.
Sources
Also known as GHSA-386p-v9x3-gxpm.