Security readout for executives and security teams
Plain-English summary
Samsung Contacts on some Samsung Android devices did not properly sanitize incoming intents. Before the June 2021 Samsung Mobile security release, a local attacker could gain Samsung Contacts-level permission to access arbitrary data. This is a device-fleet issue, not an internet-facing server issue.
Executive priority
Treat this as a moderate mobile fleet hygiene issue. Prioritize confirming that managed Samsung devices received the June 2021 update, especially where devices handle corporate contacts or sensitive business data.
Technical view
CVE-2021-25413 is a CWE-20 input validation flaw in Samsung Contacts affecting Samsung Mobile devices on Android P, Q, and R before SMR JUN-2021 Release 1. The reported impact is local privilege use to access arbitrary data with Samsung Contacts privilege. No CVSS score is provided.
Likely exposure
Exposure is limited to Samsung Mobile devices running Android 9, 10, or 11 that had not received SMR JUN-2021 Release 1 or later. The source bundle does not support applying this to non-Samsung devices or other Samsung applications.
Exploitation context
The CVE describes local attackers, so exploitation requires local device context. CISA KEV status is false, and the supplied sources do not state active exploitation, public exploit availability, or remote attack capability.
Researcher notes
The available record gives impact, affected Android generations, and fixed release, but not detailed exploit mechanics. Validation should focus on version exposure and vendor bulletin mapping. Do not assume active exploitation or affected scope beyond Samsung Contacts on listed Samsung Mobile versions.
Mitigation direction
- Update affected Samsung devices to SMR JUN-2021 Release 1 or later.
- Check Samsung’s June 2021 security bulletin for model-specific update availability.
- Enforce mobile fleet minimum security patch levels through MDM or EMM.
- Replace or isolate unsupported affected devices that cannot receive the update.
- Limit installation of untrusted local applications where update gaps remain.
Validation and detection
- Inventory Samsung Mobile devices running Android 9, 10, or 11.
- Confirm each device security patch level is June 2021 Release 1 or later.
- Verify Samsung Contacts is present on unmanaged or legacy devices.
- Review MDM compliance reports for devices below the required patch level.
- Track exceptions for devices that cannot be patched.
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-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-25413 mapping review
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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/securityUpdate.smsb?year=2021&month=6CVE reference · x_refsource_MISC
- https://blog.oversecured.com/Two-weeks-of-securing-Samsung-devices-Part-2/CVE 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.