CVE-2021-25372 Samsung CVE debrief

Who should care

Samsung Mobile Devices administrators, mobile fleet managers, endpoint/security operations teams, and any organization with Samsung devices in production or employee-managed environments should review this CVE promptly because it is listed in CISA KEV.

Technical summary

The source corpus identifies CVE-2021-25372 as an "Improper Boundary Check Vulnerability" in Samsung Mobile Devices. CISA’s KEV entry indicates the issue is known to be exploited in the wild, but the provided sources do not disclose affected firmware versions, attack surface, privilege requirements, or specific impact. The KEV notes point to Samsung’s March 2021 security update page as the vendor remediation reference.

Defensive priority

High. CISA KEV listing means this should be treated as an urgent patch-and-verify item, with remediation aligned to the CISA due date of 2023-07-20.

Recommended defensive actions

• Check Samsung’s official security update guidance referenced by CISA and determine whether any managed devices are affected.
• Apply vendor-provided updates as soon as possible on all reachable Samsung Mobile Devices.
• If updates are unavailable for any device, follow CISA guidance to discontinue use or isolate the product until a fix is available.
• Inventory and prioritize internet-facing, privileged, or unmanaged devices first.
• Validate remediation through version checks or endpoint management reporting after patching.

Evidence notes

Supported by the supplied CISA KEV source item, which names Samsung as the vendor, Mobile Devices as the product, and states the vulnerability is known exploited. The KEV metadata also supplies the remediation instruction to apply vendor updates or discontinue use if updates are unavailable, along with the due date of 2023-07-20. The corpus also includes official CVE and NVD links, but no additional technical details beyond the vulnerability name are provided here.

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.