What is CVE-2026-33957?

CVE-2026-33957 is a medium-severity vulnerability in Samsung Exynos 1580 Firmware, classified under Out-of-bounds Write. CVSS score: 4.2/10. Published 2026-09-14.

How severe is CVE-2026-33957?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Buffer overflow in Samsung Exynos 1580 Firmware

CVE-2026-33957

An issue was discovered in CustOS Driver in Samsung Mobile Processor Exynos 1580. Requesting oversized shared memory from the custos_iwc device enables out-of-bounds read and write, potentially leading to memory corruption or information leakage.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L.

Affected products

Samsung Exynos 1580 Firmware

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-33957?: CVE-2026-33957 is a medium-severity vulnerability in Samsung Exynos 1580 Firmware, classified under Out-of-bounds Write. CVSS score: 4.2/10. Published 2026-09-14.
How severe is CVE-2026-33957?: Medium severity. CVSS v3 base score is 4.2 out of 10.