What is CVE-2025-27807?

CVE-2025-27807 is a critical-severity vulnerability in Samsung Exynos 1080, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-01-05.

How severe is CVE-2025-27807?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Samsung Exynos 1080

CVE-2025-27807

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.

Vulnerability class: Buffer Overflow

Published 2026-01-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

semiconductor.samsung.com/support/quality-support/product-security-updates/ (Vendor Advisory)
semiconductor.samsung.com/support/quality-support/product-security-updates/cve-… (Vendor Advisory)

Frequently asked questions

What is CVE-2025-27807?: CVE-2025-27807 is a critical-severity vulnerability in Samsung Exynos 1080, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-01-05.
How severe is CVE-2025-27807?: Critical severity. CVSS v3 base score is 9.1 out of 10.