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CVE-2026-21133 Samsung Mobile CVE debrief

This PatchSiren debrief is based on CVE-2026-21133, which describes a path traversal vulnerability in Samsung Flow prior to version 4.9.22.1. The vulnerability allows local attackers to access clipboard data. Affected product deployments should be identified in managed environments, and owners should be assigned for follow-up. The CVE record and source item provide limited information about the vulnerability, but confirm that it exists in versions prior to 4.9.22.1 of Samsung Flow. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Vendor
Samsung Mobile
Product
Samsung Flow
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-12
Original CVE updated
2026-10-12
Advisory published
2026-10-12
Advisory updated
2026-10-12

Who should care

Defenders responsible for managing Samsung Flow installations should assess exposure and prioritize updates to version 4.9.22.1 or later. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-21133 is a medium-severity path traversal vulnerability in Samsung Flow that allows local attackers to access clipboard data. Defenders should prioritize verifying and updating Samsung Flow installations to version 4.9.22.1 or later to prevent potential clipboard data access.

  • Local attackers may access sensitive clipboard data
  • Clipboard data confidentiality may be compromised
  • Defenders must verify and update Samsung Flow installations

Technical summary

CVE-2026-21133 is a path traversal vulnerability in Samsung Flow prior to version 4.9.22.1. Local attackers can exploit this vulnerability to access clipboard data. The vulnerability has a medium severity and a CVSS score of 5.1. Defenders should prioritize verifying and updating Samsung Flow installations to version 4.9.22.1 or later to prevent potential clipboard data access.

Defensive priority

Defenders should prioritize verifying and updating Samsung Flow installations to version 4.9.22.1 or later to prevent potential clipboard data access.

Recommended defensive actions

  • Verify Samsung Flow installations and update to version 4.9.22.1 or later
  • Monitor for potential local attacks attempting to access clipboard data
  • Implement additional security measures to protect sensitive clipboard data

Evidence notes

The CVE record and source item provide limited information about the vulnerability, but confirm that it exists in versions prior to 4.9.22.1 of Samsung Flow.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21133 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21133

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

  • CVE-2026-21133 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21133

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

Supplemental references

  • CVE-2026-21133

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21133.json

    cve_program_cvelist_v5

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.