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CVE-2026-21021

Quick assessment

Affected
Samsung Mobile Samsung Mobile Devices
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SAMSUNG Mobile devices是韩国三星（SAMSUNG）公司的一系列的三星移动设备，包括手机、平板等。 SAMSUNG Mobile devices SMR May-2026 Release 1之前版本存在安全漏洞，该漏洞源于输入验证不当，可能导致物理攻击者启动特权活动。

AI Predicted 5.5 Difficulty: Hard EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1503

Affected Version Matrix 1

VendorProduct Version RangeStatus
Samsung Mobile Samsung Mobile Devices SMR May-2026 Release in Android 16< * unaffected
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I. Basic Information for CVE-2026-21021

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Improper input validation in Routines prior to SMR May-2026 Release 1 allows physical attackers to launch privileged activity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
SAMSUNG Mobile devices 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SAMSUNG Mobile devices是韩国三星（SAMSUNG）公司的一系列的三星移动设备，包括手机、平板等。 SAMSUNG Mobile devices SMR May-2026 Release 1之前版本存在安全漏洞，该漏洞源于输入验证不当，可能导致物理攻击者启动特权活动。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Samsung Mobile Samsung Mobile Devices SMR May-2026 Release in Android 16 ~ * -

II. Public POCs for CVE-2026-21021

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-21021

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Vendor Advisories for CVE-2026-21021 (1)

Same Patch Batch · Samsung Mobile · 2026-05-13 · 8 CVEs total

CVE-2026-21024 SAMSUNG System Support Service 安全漏洞
CVE-2026-21022 SAMSUNG SMR 安全漏洞
CVE-2026-21020 SAMSUNG SMR 安全漏洞
CVE-2026-21019 SAMSUNG Mobile devices 安全漏洞
CVE-2026-21018 SAMSUNG Mobile devices 缓冲区错误漏洞
CVE-2026-21016 SAMSUNG Mobile devices 安全漏洞
CVE-2026-21015 SAMSUNG Mobile devices 安全漏洞

IV. Related Vulnerabilities

Same product: Samsung Mobile Devices
Same vendor: Samsung Mobile

V. Comments for CVE-2026-21021

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