CVE-2025-27807: Critical severity Samsung Exynos vulnerability

Published Jan 5, 2026
·
Updated

An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400. The lack of a length check leads to out-of-bounds writes via malformed NAS packets.

Affected Software

39 affected components
Samsung Exynos=980, =990, =850, =1080, =2100, =1280, =2200, =1330, =1380, =1480, =2400, =1580, =9110, =W920, =W930, =W1000, =5123, =5300, =5400
All of the following
Samsung Exynos 990 Firmware
Samsung Exynos 990
All of the following
Samsung Exynos 980 Firmware
Samsung Exynos 980
All of the following
Samsung Exynos 850 Firmware
Samsung Exynos 850
All of the following
Samsung Exynos 1080 Firmware
Samsung Exynos 1080
All of the following
Samsung Exynos 2100 Firmware
Samsung Exynos 2100
All of the following
Samsung Exynos 1280 Firmware
Samsung Exynos 1280
All of the following
Samsung Exynos 2200 Firmware
Samsung Exynos 2200
All of the following
Samsung Exynos 1330 Firmware
Samsung Exynos 1330
All of the following
Samsung Exynos 1380 Firmware
Samsung Exynos 1380
All of the following
Samsung Exynos 1480 Firmware
Samsung Exynos 1480
All of the following
Samsung Exynos 1580 Firmware
Samsung Exynos 1580
All of the following
Samsung Exynos 2400 Firmware
Samsung Exynos 2400
All of the following
Samsung Exynos 9110 Firmware
Samsung Exynos 9110
All of the following
Samsung Exynos W930 Firmware
Samsung Exynos W930
All of the following
Samsung Exynos W920 Firmware
Samsung Exynos W920
All of the following
Samsung Exynos W1000 Firmware
Samsung Exynos W1000
All of the following
Samsung Modem 5123 Firmware
Samsung Modem 5123
All of the following
Samsung Modem 5300 Firmware
Samsung Modem 5300
All of the following
Samsung Modem 5400 Firmware
Samsung Modem 5400

Event History

Jan 5, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-27807?

The CVE-2025-27807 vulnerability is considered to be of high severity due to its potential to allow unauthorized access and out-of-bounds writes.

2

How do I fix CVE-2025-27807?

To fix CVE-2025-27807, it is recommended to install the latest firmware updates provided by Samsung for affected Exynos processors.

3

Which devices are affected by CVE-2025-27807?

CVE-2025-27807 affects a range of Samsung devices utilizing Exynos processors such as the 980, 990, 850, 1080, and several modem models.

4

What is the nature of the vulnerability in CVE-2025-27807?

CVE-2025-27807 is caused by a lack of length check leading to potential out-of-bounds writes in malformed NAS packets.

5

Is there a workaround for CVE-2025-27807?

Currently, the best approach for CVE-2025-27807 is to apply the security updates provided by Samsung, as no alternative workaround has been officially provided.

Contact

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