Security readout for executives and security teams
Plain-English summary
Samsung Flow for Android before 4.9.04 used cryptography incorrectly. A nearby attacker could potentially read protected Flow messages or inject commands. This matters for organizations allowing Samsung Flow on managed or BYOD Android devices, especially where device-to-device workflows carry business data.
Executive priority
Treat as a high-priority hygiene issue for fleets using Samsung Flow. The impact is high, but the adjacent vector, high complexity, older publication date, and lack of cited exploitation reduce the need for crisis handling.
Technical view
CVE-2023-21443 is CWE-326 in Samsung Flow for Android prior to 4.9.04. The CVSS 3.1 score is 7.5, with adjacent attack vector, high complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impacts.
Likely exposure
Exposure is limited to Android devices running Samsung Flow versions before 4.9.04. The source bundle does not identify other Samsung products, platforms, or specific vulnerable version ranges beyond prior to 4.9.04.
Exploitation context
The vulnerability requires an adjacent attacker and high attack complexity. No supplied source states active exploitation, and the CVE is not marked as CISA KEV in the bundle. Public evidence here supports risk reduction through version validation, not emergency incident assumptions.
Researcher notes
Public details in the supplied sources are limited. They identify the weak cryptographic implementation, adjacent attack requirement, potential decryption and command injection impact, and fixed version threshold. They do not provide exploit mechanics, telemetry, or broader product impact.
Mitigation direction
- Update Samsung Flow for Android to version 4.9.04 or later.
- Check Samsung Mobile guidance for any newer replacement advisories or app versions.
- Restrict Samsung Flow use where unmanaged adjacent connectivity is unacceptable.
- Prioritize managed Android devices used for business data transfer workflows.
Validation and detection
- Inventory Android devices with Samsung Flow installed.
- Confirm each installed Samsung Flow version is 4.9.04 or later.
- Review MDM or app inventory for unmanaged installations.
- Document exceptions for devices that cannot be updated immediately.
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-326: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-21443 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/serviceWeb.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.
Inadequate Encryption Strength
Inadequate Encryption Strength represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.