CVE-2026-21007
Improper check for exceptional conditions in Device Care prior to SMR Apr-2026 Release 1 allows physical attackers to bypass Knox Guard.
- Published
- Apr 13, 2026
- Updated
- Apr 13, 2026
- Assigning CNA
- SamsungMobile
- Evidence observed
- Aug 13, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLow · next 30 days
- Percentile
- 5.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Improper check for exceptional conditions in Device Care prior to SMR Apr-2026 Release 1 allows physical attackers to bypass Knox Guard.
Sources
1C simulator demonstrating a GPU driver ioctl race condition leading to use-after-free and local privilege escalation, with compile-and-run exploit demonstration.
Responsible use
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