What is the CVSS score of CVE-2025-27891?

CVE-2025-27891 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 0.4%.

Which versions of Exynos 980 Firmware are affected by CVE-2025-27891?

CVE-2025-27891 presents critical security risk, a out-of-bounds read vulnerability rated CVSS 9.1.

How to fix or mitigate CVE-2025-27891?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Exynos 980 Firmware CVE-2025-27891

CRITICAL

Out-of-bounds Read (CWE-125)

2025-05-14 cve@mitre.org

Information Disclosure Buffer Overflow Samsung Exynos 980 Firmware Exynos 990 Firmware Exynos 850 Firmware Exynos 1080 Firmware Exynos 2100 Firmware Exynos 1280 Firmware Exynos 2200 Firmware Exynos 1330 Firmware Exynos 1380 Firmware Exynos 1480 Firmware Exynos 2400 Firmware Exynos W920 Firmware Exynos W930 Firmware Exynos W1000 Firmware Exynos Modem 5123 Firmware Exynos Modem 5300 Firmware Exynos Modem 5400 Firmware

9.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:41 vuln.today

CVE Published

May 14, 2025 - 21:15 nvd

CRITICAL 9.1

DescriptionCVE.org

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

AnalysisAI

An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, W920, W930, W1000, Modem 5123, Modem 5300,. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400. The lack of a length check leads to out-of-bounds reads via malformed NAS packets. Affected products include: Samsung Exynos 980 Firmware, Samsung Exynos 990 Firmware, Samsung Exynos 850 Firmware, Samsung Exynos 1080 Firmware, Samsung Exynos 2100 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.