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CVE-2026-21007 Samsung Mobile CVE debrief

CVE-2026-21007 is a medium-severity vulnerability in Device Care prior to SMR Apr-2026 Release 1 that allows physical attackers to bypass Knox Guard due to an improper check for exceptional conditions. The CVE record was published on 2026-04-13T06:16:05.190Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects Samsung devices with Device Care enabled, potentially allowing physical attackers to bypass Knox Guard security features. Samsung device administrators and security teams should assess exposure and apply the April 2026 SMR update to vulnerable devices.

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
CVSS
MEDIUM 4.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-13
Original CVE updated
2026-10-26
Advisory published
2026-04-13
Advisory updated
2026-10-26

Who should care

Samsung device administrators and security teams should assess exposure and apply the April 2026 SMR update to vulnerable devices. This vulnerability affects organizations using Samsung devices with Device Care and Knox Guard enabled. IT teams responsible for patch management and vulnerability mitigation should prioritize this update to prevent potential security breaches.

Why it matters

CVE-2026-21007 is a medium-severity vulnerability in Device Care that allows physical attackers to bypass Knox Guard. Samsung device administrators and security teams should assess exposure and apply the April 2026 SMR update to vulnerable devices.

  • Physical attackers may bypass Knox Guard on vulnerable Samsung devices
  • Device administrators must apply the April 2026 SMR update to prevent bypass
  • Verify device configurations to ensure Knox Guard is enabled and functional

Technical summary

The vulnerability is caused by an improper check for exceptional conditions in Device Care prior to SMR Apr-2026 Release 1, allowing physical attackers to bypass Knox Guard. This issue is specific to Device Care and Knox Guard configurations in Samsung devices. The vulnerability does not require remote access or complex exploitation techniques, making it a significant concern for physical security.

Defensive priority

Apply the April 2026 SMR update to vulnerable Samsung devices to prevent physical attackers from bypassing Knox Guard.

Recommended defensive actions

  • Apply the April 2026 SMR update to vulnerable Samsung devices
  • Inventory Samsung devices for Device Care and Knox Guard usage
  • Verify device configurations to ensure Knox Guard is enabled

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, but do not specify which Samsung devices are affected or if there are any known exploits.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21007 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21007

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21007 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21007

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.