CVE-2018-21066

CRITICALNVD 9.89.8—

9.8

An issue was discovered on Samsung mobile devices with M(6.0) (Exynos or MediaTek chipsets) software. There is a buffer overflow in a Trustlet that can cause memory corruption. The Samsung ID is SVE-2018-11599 (July 2018).

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 39.7%
KEV: Not listed

Published

April 8, 2020

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://security.samsungmobile.com/securityUpdate.smsb
af854a3a-2127-422b-91ae-364da2661108https://security.samsungmobile.com/securityUpdate.smsb

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 05:24 UTCEG score recompute
2026-05-27 05:24 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-21066?

CVE-2018-21066 is a critical vulnerability published on April 8, 2020. An issue was discovered on Samsung mobile devices with M(6.0) (Exynos or MediaTek chipsets) software. There is a buffer overflow in a Trustlet that can cause memory corruption. The Samsung ID is SVE-2018-11599 (July 2018).

When was CVE-2018-21066 disclosed?

CVE-2018-21066 was first published in the National Vulnerability Database on April 8, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-21066 actively exploited?

CVE-2018-21066 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-21066?

CVE-2018-21066 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-21066?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-21066, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-21066

📅 Published

🔄 Last Modified

🔗 References (2)