CVE-2026-21134 Samsung Mobile CVE debrief

Who should care

Defenders responsible for Samsung Flow deployments should assess exposure and prioritize remediation. This vulnerability may impact environments with adjacent attackers.

Why it matters

CVE-2026-21134 is a MEDIUM-severity vulnerability in Samsung Flow that allows adjacent attackers to access sensitive information. Defenders should prioritize verifying and applying patches, assessing exposure, and monitoring for exploitation attempts.

• Verify and apply patches to prevent exploitation.
• Assess and mitigate exposure in your environment.
• Monitor for potential exploitation attempts.

Technical summary

CVE-2026-21134 is an improper authentication vulnerability in Samsung Flow prior to version 4.9.22.4. This vulnerability allows adjacent attackers to access sensitive information. The CVSS score is 6.1 (MEDIUM). The affected product, Samsung Flow, is impacted by this vulnerability, which is classified as a MEDIUM-severity issue. Defenders should prioritize verifying and applying the patched version of Samsung Flow, assessing exposure in their environment, and monitoring for potential exploitation attempts. The official CVE Program record and NVD detail page have

Defensive priority

Defenders should prioritize verifying and applying the patched version of Samsung Flow, assessing exposure in their environment, and monitoring for potential exploitation attempts.

Recommended defensive actions

• Verify and apply the patched version of Samsung Flow (version 4.9.22.4 or later) to prevent exploitation.
• Assess exposure in your environment and prioritize remediation for affected systems.
• Monitor for potential exploitation attempts and adjust security controls as needed.

Evidence notes

The CVE Program and NVD have provided official records of this vulnerability. However, details on exploitation and impact are limited. There is no information on known or unknown affected scope. Defenders should verify the patched version of Samsung Flow (version 4.9.22.4 or later) to prevent exploitation and assess exposure in their environment. The CVE record was published on 2026-10-12T04:57:52.541Z and has not been modified since then. The official CVE Program record and NVD detail

Sources and references

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.