Security readout for executives and security teams
Plain-English summary
This is a low-severity Samsung Contacts issue. On affected Samsung Mobile Devices, a local attacker could cause limited disclosure of an account ID if the user interacts with the attack path. The sources do not indicate device takeover, data modification, service disruption, or active exploitation.
Executive priority
Treat this as routine mobile patch hygiene, not an emergency. The business risk is limited account identifier exposure on outdated Samsung devices, with user interaction required. Address through normal mobile update compliance, prioritizing sensitive users and unmanaged devices.
Technical view
CVE-2023-21436 is described as improper use of an implicit intent in Samsung Contacts before SMR Feb-2023 Release 1. Affected platforms are Samsung Mobile Devices running Android Q(10), R(11), S(12), and T(13). CVSS 3.1 is 3.3: local access, low complexity, no privileges, user interaction required, low confidentiality impact.
Likely exposure
Exposure is limited to Samsung Mobile Devices on the listed Android generations that have not received Samsung SMR Feb-2023 Release 1 or later. Organizations with unmanaged Android fleets or delayed mobile patching are more likely to retain exposure.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation. The CVSS vector indicates exploitation requires local access and user interaction, with only limited confidentiality impact. Evidence is sparse beyond Samsung's advisory-level description.
Researcher notes
The public details are minimal: Samsung describes implicit intent misuse in Contacts causing account ID exposure. CWE-285 is assigned, but no vulnerable component version, proof-of-concept, exploit telemetry, or detailed fix mechanics are provided in the source bundle.
Mitigation direction
- Update affected Samsung devices to SMR Feb-2023 Release 1 or later.
- Check Samsung's security bulletin for model-specific update availability.
- Use MDM reporting to identify devices below the required Samsung security maintenance release.
- Prioritize managed devices that handle sensitive accounts or business contacts.
- If updates are unavailable, consult Samsung guidance for supported device options.
Validation and detection
- Inventory Samsung Mobile Devices running Android Q(10), R(11), S(12), or T(13).
- Confirm each device reports SMR Feb-2023 Release 1 or later.
- Review MDM compliance data for stale Android security patch levels.
- Verify high-risk user groups are not using unsupported Samsung devices.
- Track Samsung advisory updates for any changed remediation or exploitation information.
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-285: 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 lookupCVE-2023-21436 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
- Low
- CVSS
- 3.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=02CVE reference
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 Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.