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PatchSiren cyber security CVE debrief

CVE-2021-25371 Samsung CVE debrief

CVE-2021-25371 is listed by CISA as a known exploited vulnerability affecting Samsung Mobile Devices. The public record provided here describes it only as an unspecified Samsung mobile device issue, so defenders should rely on vendor guidance and prioritize patching or removal of unpatched devices. Because it appears in the KEV catalog, it should be treated as a high-priority remediation item for exposed fleets.

Vendor
Samsung
Product
Mobile Devices
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-06-29
Original CVE updated
2023-06-29
Advisory published
2023-06-29
Advisory updated
2023-06-29

Who should care

Samsung mobile device owners, enterprise mobility and endpoint teams, mobile device management administrators, and security teams responsible for patch compliance should prioritize this CVE. It is especially relevant where Samsung devices are deployed in managed or internet-connected environments.

Technical summary

The supplied corpus identifies CVE-2021-25371 as a Samsung Mobile Devices vulnerability with no additional public technical detail, CVSS score, or affected-version breakdown. CISA’s KEV entry indicates the issue is known to have been exploited, and the accompanying guidance is to apply vendor updates or discontinue use if updates are unavailable. The source metadata also points to Samsung security update guidance referenced by CISA, but the exact flaw mechanics are not provided in the supplied record.

Defensive priority

High. A KEV listing means CISA has determined the vulnerability is known to be exploited in the wild, so remediation should be urgent and tracked to the due date provided in the KEV metadata.

Recommended defensive actions

  • Apply Samsung-provided updates or mitigations as soon as possible using vendor guidance.
  • If updates are unavailable for a device model, discontinue use or remove it from service per CISA guidance.
  • Inventory Samsung mobile devices to identify exposed or unpatched systems.
  • Prioritize internet-facing, high-value, and managed enterprise devices for remediation first.
  • Confirm patch status and document completion against the KEV due date.
  • Monitor official Samsung and CISA advisories for any model-specific follow-up guidance.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD references. The corpus states: vendor Samsung, product Mobile Devices, vulnerability name "Samsung Mobile Devices Unspecified Vulnerability," date added 2023-06-29, due date 2023-07-20, and required action to apply updates per vendor instructions or discontinue use if updates are unavailable. No exploit details, affected versions, or CVSS metrics were provided in the corpus.

Official resources

Public debrief prepared from official CISA KEV, CVE, and NVD references. It intentionally avoids unsupported technical claims and includes only defensive guidance reflected in the supplied corpus.