Security readout for executives and security teams
Plain-English summary
Samsung’s Galaxy Watch PlugIn could write the smartphone’s connected Wi-Fi password into logs. Someone who already had permission to access those logs could recover the password. The issue affects versions before 2.2.05.21033151.
Executive priority
Prioritize remediation where Samsung wearables are used on corporate Wi-Fi or managed phones. This is not documented as actively exploited, but leaked Wi-Fi credentials can create lateral access and incident response cost.
Technical view
CVE-2021-25420 is an improper log management issue, mapped to CWE-779, in Samsung Mobile Galaxy Watch PlugIn before 2.2.05.21033151. The public description says an attacker with log permissions can leak the Wi-Fi password connected to the user smartphone from logs.
Likely exposure
Exposure is limited to environments with Samsung Galaxy Watch PlugIn versions earlier than 2.2.05.21033151. Risk is highest on managed Android devices where log access is available to users, apps, support tooling, or debugging workflows.
Exploitation context
The source bundle does not show KEV listing, public active exploitation, CVSS scoring, or detailed prerequisites beyond needing log permissions. Treat this as credential exposure risk rather than confirmed remote code execution.
Researcher notes
Evidence is sparse: no CVSS vector, affected version range beyond “prior to 2.2.05.21033151,” or exploit details are provided. The key research focus is confirming log access paths and whether sensitive credentials were captured before update.
Mitigation direction
- Inventory devices with Samsung Galaxy Watch PlugIn installed.
- Update Galaxy Watch PlugIn to version 2.2.05.21033151 or later.
- Restrict unnecessary log access, debugging, and support collection permissions.
- Check Samsung’s June 2021 mobile security guidance for vendor-specific instructions.
Validation and detection
- Confirm installed Galaxy Watch PlugIn versions across managed devices.
- Verify affected devices are below 2.2.05.21033151.
- Review device management policy for log access permissions.
- Check whether support logs may contain sensitive Wi-Fi credentials.
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-2021-25420 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.