Is CVE-2018-21054 actively exploited?

No active exploitation of CVE-2018-21054 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-21054 be exploited remotely?

Yes. CVE-2018-21054 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-21054?

CVE-2018-21054 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-21054

CWE-190Published: April 8, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered on Samsung mobile devices with M(6.0), N(7.x) and O(8.x) except exynos9610/9820 in all Platforms, M(6.0) except MSM8909 SC77xx/9830 exynos3470/5420, N(7.0) except MSM8939, N(7.1) except MSM8996 SDM6xx/M6737T software. There is an integer underflow with a resultant buffer overflow in eCryptFS. The Samsung ID is SVE-2017-11857 (September 2018).

NVD Source

Technical Analysis

CVE-2018-21054 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.