Security readout for executives and security teams
Plain-English summary
CVE-2023-21440 lets a local attacker capture the screen on affected Samsung Mobile Devices running Android 13 before Samsung’s February 2023 SMR Release 1. The main business risk is exposure of sensitive information shown on the device, such as messages, documents, credentials, or regulated data.
Executive priority
Treat this as a mobile confidentiality risk requiring patch compliance, not an emergency response item based on the provided evidence. Prioritize fleets handling sensitive customer, employee, legal, or financial information.
Technical view
Samsung describes improper access control in WindowManagerService that allows an attacker to take a screen capture. The CVSS 3.1 score is 6.2, with local attack vector, low complexity, no privileges or user interaction, unchanged scope, and high confidentiality impact only.
Likely exposure
Exposure is limited to Samsung Mobile Devices on Android 13 before SMR Feb-2023 Release 1. The provided sources do not list exact models or CPEs, so asset owners should validate against Samsung’s advisory and device patch levels.
Exploitation context
The source bundle does not show active exploitation, and KEV status is false. The attack is local, but it requires no privileges or user interaction according to the CVSS vector, making lost, shared, unmanaged, or compromised devices more relevant.
Researcher notes
The public description is concise and does not provide vulnerable code details, affected model granularity, or exploit telemetry. Analysis should stay anchored to Samsung’s WindowManagerService access-control statement, Android 13 scope, and the Feb-2023 SMR Release 1 boundary.
Mitigation direction
- Apply Samsung SMR Feb-2023 Release 1 or later where applicable.
- Check Samsung’s advisory for affected model and firmware details.
- Enforce mobile device patch compliance through MDM.
- Prioritize devices used for sensitive communications or regulated data.
- Restrict use of unsupported or unpatchable Samsung Android 13 devices.
Validation and detection
- Inventory Samsung Android 13 devices in the managed fleet.
- Verify each device security patch level against Samsung’s February 2023 SMR guidance.
- Confirm vulnerability scanners or MDM checks map CVE-2023-21440 correctly.
- Review exception lists for devices unable to receive the fixed release.
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
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ATT&CK lookup starting points
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CWE-285: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-21440 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/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:N/S:U/C:H/I:N/A:N2.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/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.