Security readout for executives and security teams
Plain-English summary
This issue could expose a user’s smartphone Wi-Fi password through logs created by Samsung’s Galaxy Watch3 PlugIn. It is not described as remote unauthenticated compromise; the cited condition requires an attacker with permission to read logs.
Executive priority
Treat as a moderate mobile credential exposure issue. Prioritize managed-device inventory, plugin updates, and Wi-Fi credential rotation where log collection or device compromise is plausible.
Technical view
CVE-2021-25421 is a CWE-779 improper log management flaw in Galaxy Watch3 PlugIn before version 2.2.09.21033151. The vulnerable plugin may place the connected smartphone’s Wi-Fi password in logs, allowing disclosure to an attacker with log permissions.
Likely exposure
Exposure is limited to environments using Samsung Galaxy Watch3 PlugIn versions earlier than 2.2.09.21033151 on paired smartphones. Risk is higher where devices are shared, poorly managed, rooted, or allow apps/users to access diagnostic logs.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Abuse requires log access, so this is primarily a credential exposure risk after local, app-level, administrative, or diagnostic-log access is obtained.
Researcher notes
Evidence is narrow but consistent: the CVE record identifies the vulnerable component, the affected version boundary, CWE-779, and the leaked secret type. No CVSS vector, exploit details, or independent exploitation evidence were provided.
Mitigation direction
- Update Galaxy Watch3 PlugIn to version 2.2.09.21033151 or later.
- Use official Samsung or app-store update channels only.
- Restrict diagnostic log access on managed smartphones.
- Review vendor guidance for any additional cleanup steps.
- Rotate exposed Wi-Fi credentials if logs may have been collected.
Validation and detection
- Inventory devices using Samsung Galaxy Watch3 PlugIn.
- Confirm installed plugin versions are 2.2.09.21033151 or later.
- Check MDM records for unmanaged or outdated paired smartphones.
- Verify diagnostic logging access is restricted by policy.
- Where authorized, confirm logs no longer contain Wi-Fi passwords after updating.
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-779: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-25421 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.
Logging of Excessive Data
Logging of Excessive Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.