PT-2026-1320 · Samsung · Modem 5400+18

Published 2026-01-05 · Updated 2026-01-29 · CVE-2025-27807

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 990 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 850 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1080 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 2100 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1280 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 2200 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1330 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1380 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1480 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 2400 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 1580 Samsung Mobile Processor, Wearable Processor, and Modem Exynos 9110 Samsung Mobile Processor, Wearable Processor, and Modem W920 Samsung Mobile Processor, Wearable Processor, and Modem W930 Samsung Mobile Processor, Wearable Processor, and Modem W1000 Samsung Modem 5123 Samsung Modem 5300 Samsung Modem 5400

Description The software suffers from a flaw due to the absence of a length check, which can result in out-of-bounds writes when processing malformed NAS packets.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2025-27807

Affected Products

Exynos 1080

Exynos 1280

Exynos 1330

Exynos 1380

Exynos 1480

Exynos 1580

Exynos 2100

Exynos 2200

Exynos 2400

Exynos 850

Exynos 9110

Exynos 980

Exynos 990

Modem 5123

Modem 5300

Modem 5400

W1000

W920

W930

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2025-27807 · Security Note
• https://semiconductor.samsung.com/support/quality-support/product-security-updates · Vendor Advisory
• https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-27807 · Vendor Advisory
• https://twitter.com/CVEnew/status/2008256848898781470 · Twitter Post
• https://twitter.com/TheHackerWire/status/2008679853487489302 · Twitter Post
• https://t.me/CVEtracker/41408 · Telegram Post
• https://reddit.com/r/GalaxyS21/comments/1qqh2tt/s21_firmware_security_update_downloaded_in_usa · Reddit Post