Security readout for executives and security teams
Plain-English summary
This Samsung Mobile DSP driver flaw can let an attacker access memory outside intended boundaries on specific Exynos-based devices. The technical attack conditions are restrictive, but CISA lists the CVE as known exploited, raising urgency for fleets with affected phones or tablets.
Executive priority
Treat this as a high-priority mobile fleet issue where affected Samsung devices exist. The exploitation conditions are restrictive, but KEV listing means remediation should not wait for routine patch cycles.
Technical view
CVE-2021-25372 is an improper boundary check issue in Samsung's DSP driver before SMR Mar-2021 Release 1. The CVSS vector indicates physical access, high complexity, and high privileges are required, with high confidentiality, integrity, and availability impact if exploited.
Likely exposure
Exposure appears limited to Samsung Mobile Q(10.0) and R(11.0) devices with Exynos 980, Exynos 2100, or Exynos 9830, before SMR Mar-2021 Release 1. Internet-facing exposure is not indicated by the supplied CVSS vector.
Exploitation context
CISA KEV status supports known exploitation. The provided sources do not describe public exploit details, attack campaigns, or weaponization. The CVSS vector suggests exploitation is not a simple remote attack and requires substantial access conditions.
Researcher notes
The source bundle identifies the vulnerable component and affected chipsets but does not provide root-cause detail, proof-of-concept material, exploit chain context, or Samsung advisory text beyond the SMR boundary. Avoid assuming broader Samsung or non-Exynos exposure without vendor confirmation.
Mitigation direction
- Inventory Samsung Mobile devices running Android Q or R with listed Exynos chipsets.
- Update affected devices to SMR Mar-2021 Release 1 or later vendor security guidance.
- Prioritize managed, high-value, executive, and field devices for verification.
- Retire or isolate devices that cannot receive applicable Samsung security updates.
- Monitor Samsung Mobile and CISA KEV entries for revised remediation guidance.
Validation and detection
- Check MDM inventory for Samsung model, Android version, chipset, and security patch level.
- Confirm affected devices are no longer before SMR Mar-2021 Release 1.
- Validate executive and privileged-user devices separately from general fleet reporting.
- Review mobile EDR or MDM telemetry for unusual device integrity or privilege events.
- Document exceptions for unsupported devices and apply compensating controls.
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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Open ATT&CK lookupCVE-2021-25372 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
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:P/AC:H/PR:H/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.
CISA KEV status
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:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H0.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsbCVE reference · x_refsource_CONFIRM
- https://security.samsungmobile.com/CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25372CVE reference · government-resource
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 Check or Handling of Exceptional Conditions
Improper Check or Handling of Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.