CVE-2025-66369: High severity Samsung Exynos 980 vulnerability

Published May 5, 2026
·
Updated

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.

Affected Software

16 affected components
Samsung Exynos 980
Samsung Exynos 990
Samsung Exynos 850
Samsung Exynos 2100
Samsung Exynos 1280
Samsung Exynos 2200
Samsung Exynos 1330
Samsung Exynos 1380
Samsung Exynos 1480
Samsung Exynos 2400
Samsung Exynos 1580
Samsung Exynos W920
Samsung Exynos W930
Samsung Exynos W1000
Samsung Exynos Modem 5123
Samsung Exynos Modem 5300

Event History

May 5, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2025-66369?

CVE-2025-66369 has been classified with a critical severity due to potential denial of service vulnerabilities.

2

How do I fix CVE-2025-66369?

To fix CVE-2025-66369, users should update their affected Samsung Exynos devices to the latest firmware provided by Samsung.

3

Which devices are affected by CVE-2025-66369?

CVE-2025-66369 affects multiple Samsung Exynos processors including the 980, 990, 850, and several modem variants.

4

What is the impact of CVE-2025-66369?

The impact of CVE-2025-66369 includes the potential for denial of service when handling 5G NR NAS registration accept messages.

5

Is there a workaround for CVE-2025-66369?

Currently, the recommended approach for CVE-2025-66369 is to apply the necessary firmware updates, as no official workaround has been provided.

Contact

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