---
id: CVE-2025-66366
title: >-
  Incorrect handling of unauthenticated downlink RRC Setup messages can cause
  the baseband to crash
summary: >-
  Incorrect handling of unauthenticated downlink RRC Setup messages can cause
  the baseband to crash
severity: none
cwe:
  - CWE-129
vendor: Samsung Semiconductor
product: Exynos 1280
affected:
  - exynos_1280 < July 2026
  - exynos_1330 < July 2026
  - exynos_1380 < July 2026
  - exynos_1480 < July 2026
  - exynos_2400 < July 2026
  - exynos_1580 < July 2026
  - exynos_2500 < July 2026
  - exynos_modem_5300 < July 2026
  - exynos_modem_5400 < July 2026
  - exynos_modem_5410 < July 2026
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:38:04.503Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-66366'
references:
  - url: >-
      https://semiconductor.samsung.com/support/quality-support/product-security-updates/
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.700Z'
---

## Overview

Incorrect handling of unauthenticated downlink RRC Setup messages can cause the baseband to crash

## Affected

- `exynos_1280 < July 2026`
- `exynos_1330 < July 2026`
- `exynos_1380 < July 2026`
- `exynos_1480 < July 2026`
- `exynos_2400 < July 2026`
- `exynos_1580 < July 2026`
- `exynos_2500 < July 2026`
- `exynos_modem_5300 < July 2026`
- `exynos_modem_5400 < July 2026`
- `exynos_modem_5410 < July 2026`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.