CVE-2025-27807 Memory corruption in n/a

Critical 9.1 Published 5 Jan 2026 Updated 6 Jan 2026

Attackers can execute arbitrary code or escalate privileges via malformed NAS packets due to missing length checks in Samsung Exynos modems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-27807?

CVE-2025-27807 is a critical memory corruption vulnerability in Samsung Exynos 1080 Firmware, published on 5 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-787

Which versions are affected by CVE-2025-27807?

It affects 19 products.

Products include Samsung Exynos 1080 Firmware, Samsung Exynos 1280 Firmware, Samsung Exynos 1330 Firmware, Samsung Exynos 1380 Firmware, Samsung Exynos 1480 Firmware, Samsung Exynos 1580 Firmware and 13 more.

How do I fix CVE-2025-27807?

No fix has been published for CVE-2025-27807 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-27807 being exploited?

There is no known exploitation of CVE-2025-27807 in the wild and no public exploit code.

All Samsung Exynos 1080 Firmware vulnerabilities

Sources

Also known as GHSA-g6g4-w873-pwc4.