What is the CVSS score of CVE-2025-27807?

CVE-2025-27807 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: 0.1%.

How to fix or mitigate CVE-2025-27807?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Exynos 1080 Firmware CVE-2025-27807

CRITICAL

Out-of-bounds Write (CWE-787)

2026-01-05 cve@mitre.org

Samsung Exynos 1080 Firmware Exynos 1280 Firmware Exynos 1330 Firmware Exynos 1380 Firmware Exynos 1480 Firmware Exynos 1580 Firmware Exynos 2100 Firmware Exynos 2200 Firmware Exynos 2400 Firmware Exynos 850 Firmware Exynos 9110 Firmware Exynos 980 Firmware Exynos 990 Firmware Exynos W1000 Firmware Exynos W920 Firmware Exynos W930 Firmware Modem 5123 Firmware Modem 5300 Firmware Modem 5400 Firmware

9.1

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-787 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, write limits MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 9.1 (Critical). Network vector (cellular), no auth, no interaction. Baseband exploits are among the most dangerous mobile vulnerabilities. A fake base station within radio range can target any nearby device. EPSS 0.06%.
Exploit ScenarioDerived	An attacker deploys a rogue LTE base station in a target area. Nearby Samsung devices connect to it. The attacker sends crafted NAS packets that trigger the OOB write in the Exynos baseband, gaining code execution below the Android OS.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Samsung Exynos processors (multiple models including 980, 990, 2100, 2200, 2400) and modems have an out-of-bounds write via malformed NAS (Non-Access Stratum) packets. This baseband vulnerability can be exploited over the cellular network without user interaction, potentially affecting millions of devices.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 9.1

Samsung Exynos baseband processors have an OOB write via malicious NAS packets, exploitable over the cellular network without user interaction.

RemediationAI

Apply Samsung security updates. These are typically distributed through carrier OTA updates. No user-side mitigation exists for baseband vulnerabilities.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The NAS packet parser in Exynos baseband firmware fails to validate length fields (CWE-787), causing out-of-bounds writes. NAS operates between the device and the core network – a rogue base station or compromised network element can send crafted packets directly to the baseband processor. Baseband vulnerabilities execute below the OS, often with DMA access to main memory.

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Exploit and PoC references, threat intelligence from 22 sources

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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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

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, 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.

Executive ViewAI

Why It Matters

CVE-2025-27807 presents critical security risk, a out-of-bounds write vulnerability rated CVSS 9.1. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.

Threat Intelligence Overview

EPSS Score

0.1%

Top 83% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +46

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Affected Products (CPE)CVE.org

cpe:2.3:o:samsung:exynos_990_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_980_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_850_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1080_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_2100_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1280_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_2200_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1330_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1380_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1480_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_1580_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_2400_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_9110_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_w930_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_w920_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:exynos_w1000_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:modem_5123_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:modem_5300_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:samsung:modem_5400_firmware:-:*:*:*:*:*:*:*

More in Exynos 1080 Firmware

View all

CVE-2023-26496 CRITICAL Act Now

9.8 Mar 23

An issue was discovered in Samsung Baseband Modem Chipset for Exynos Modem 5123, Exynos Modem 5300, Exynos 980, Exynos 1

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9.8 Mar 13

An issue was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 850, Exynos 980, Exynos 1080, Ex

CVE-2023-26074 CRITICAL Act Now

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An issue was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 850, Exynos 980, Exynos 1080, Ex

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CVE-2023-24033 CRITICAL Act Now

9.8 Mar 13

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9.8 Mar 10

An issue was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 850, Exynos 980, Exynos 1080, Ex

CVE-2025-47202 CRITICAL Act Now

9.1 Jul 07

In RRC in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 13

CVE-2025-23102 HIGH This Week

8.8 Jun 03

Double-free vulnerability in Samsung's Exynos mobile processors (models 980, 990, 1080, 2100, 1280, 2200, 1380, 1480, an

CVE-2024-32502 HIGH This Week

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An issue was discovered in Samsung Mobile Processor and Wearable Processor Exynos 850, Exynos 1080, Exynos 2100, Exynos

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An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 9820, 9825, 980, 990, 850, 108

Same weakness CWE-787 – Out-of-bounds Write

View all

CVE-2015-3113 CRITICAL POC

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CVE-2011-2462 CRITICAL POC

9.8

CVE-2012-1889 HIGH POC

8.8

CVE-2010-3333 HIGH POC

7.8

CVE-2014-1761 HIGH POC

7.8

CVE-2009-3129 HIGH POC

7.8

CVE-2021-1732 HIGH POC

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CVE-2013-3346 CRITICAL POC

9.8

References

Advisories & patches

ADVISORY https://semiconductor.samsung.com/support/quality-support/product-security-updates/ ADVISORY https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-27807/

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GitHub PoC

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