Security readout for executives and security teams
Plain-English summary
CVE-2021-25390 is a Samsung Mobile PhotoTable intent redirection issue fixed in Samsung’s May 2021 security maintenance release. A malicious local app could trigger a privileged action through improper intent handling. The public bundle rates it medium severity with limited confidentiality impact and no confirmed active exploitation.
Executive priority
Treat this as a moderate mobile fleet hygiene issue. It is not cited as actively exploited, but unpatched Samsung devices from affected Android generations remain avoidable endpoint risk, especially where employees can install apps outside managed controls.
Technical view
The issue is classified as CWE-926 and described as intent redirection in PhotoTable before SMR MAY-2021 Release 1. Affected Samsung Mobile Devices run Android O, P, Q, or R versions listed by Samsung. CVSS 3.1 is 4.0: local attack vector, low complexity, no privileges, no user interaction, unchanged scope, low confidentiality impact.
Likely exposure
Exposure is most likely on Samsung Mobile Devices that did not receive SMR MAY-2021 Release 1 or later. The bundle provides broad OS families but no CPEs or package identifiers, so exact fleet matching depends on device model, firmware, and patch level records.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates local attack conditions, meaning practical abuse would likely require code already running on the device, such as a malicious app. No public exploit status is established in the bundle.
Researcher notes
Evidence is concise and partly incomplete. The bundle names intent redirection in PhotoTable and broad affected Android generations, but does not include CPEs, package names, fixed build identifiers, or exploit details. Validation should focus on Samsung security patch levels and vendor bulletin alignment.
Mitigation direction
- Apply Samsung SMR MAY-2021 Release 1 or later where available.
- Prioritize unsupported Samsung devices for replacement or vendor-specific guidance.
- Use MDM policy to require current Android security patch levels.
- Review Samsung’s May 2021 bulletin for device-specific update availability.
Validation and detection
- Inventory Samsung Mobile Devices and record model, OS version, and security patch level.
- Confirm affected devices are at SMR MAY-2021 Release 1 or later.
- Check vulnerability management data for CVE-2021-25390 findings.
- Validate unsupported devices have a documented risk decision or removal plan.
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
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CWE-926: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-25390 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/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:N/S:U/C:L/I:N/A:N2.51.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.oversecured.com/Two-weeks-of-securing-Samsung-devices-Part-1/CVE reference · x_refsource_MISC
- https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=5CVE 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 Export of Android Application Components
Improper Export of Android Application Components represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.