What is CVE-2023-21505?

CVE-2023-21505 is a medium-severity vulnerability in Samsung Core Services, classified under Improper Authorization. CVSS score: 4.0/10. Published 2023-05-04.

How severe is CVE-2023-21505?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Auth bypass in Samsung Core Services

CVE-2023-21505

Improper access control in Samsung Core Service prior to version 2.1.00.36 allows attacker to write arbitrary file in sandbox.

Published 2023-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.9% 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: 0.003 · change: 0.000

Affected products

Samsung Core Services
Samsung Mobile Core Service — versions unspecified

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security.samsungmobile.com/serviceWeb.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2023-21505?: CVE-2023-21505 is a medium-severity vulnerability in Samsung Core Services, classified under Improper Authorization. CVSS score: 4.0/10. Published 2023-05-04.
How severe is CVE-2023-21505?: Medium severity. CVSS v3 base score is 4.0 out of 10.