Security readout for executives and security teams
Plain-English summary
This issue affects Samsung Mobile Tizen wearable devices running version 5.5 before the June 2021 firmware update. A nearby Bluetooth attacker could reportedly take over the user's Bluetooth device without the user's awareness. Public sources do not provide a CVSS score or detailed impact boundaries.
Executive priority
Treat this as a targeted legacy-device risk rather than a broad enterprise emergency. Prioritize confirmation if the organization still uses Samsung Tizen wearables, because the stated impact is device takeover and the public evidence is sparse.
Technical view
CVE-2021-25424 is a CWE-287 improper authentication flaw in Tizen bluetooth-frwk. The affected product listed is Samsung Mobile Tizen wearable devices version 5.5 before the JUN-2021 firmware release. The public description states Bluetooth attacker takeover, but does not disclose prerequisites, attack flow, or fixed component details.
Likely exposure
Exposure is likely limited to organizations or users still operating Samsung Tizen wearable devices version 5.5 without the June 2021 firmware update. The available sources do not list specific models, deployment conditions, or enterprise management indicators.
Exploitation context
The source bundle does not show CISA KEV inclusion or any cited evidence of active exploitation. The vulnerability requires Bluetooth attacker context according to the CVE description, implying proximity or Bluetooth access matters, but public sources do not define exact range or pairing requirements.
Researcher notes
Public detail is limited to improper authentication in bluetooth-frwk and a Bluetooth attacker takeover statement. No CVSS vector, proof of concept, affected model list, or exploit telemetry is provided in the bundle. Avoid assuming impact beyond Tizen 5.5 wearable devices before JUN-2021 firmware.
Mitigation direction
- Install Samsung Mobile JUN-2021 firmware update or later on affected Tizen wearables.
- Check Samsung Mobile guidance for model-specific firmware availability and support status.
- Retire or isolate wearables that cannot receive the vendor firmware update.
- Document any unpatched devices as accepted risk or remove them from use.
Validation and detection
- Inventory Samsung Tizen wearable devices and record firmware versions.
- Confirm any Tizen 5.5 devices have the June 2021 update or later.
- Review device management records for unsupported or unpatched wearable models.
- Monitor vendor advisories for any model-specific clarification or replacement guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-25424 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=6CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.