Security readout for executives and security teams
This vulnerability affects certain Samsung mobile devices with listed Exynos chipsets running Android 9, 10, or 11 before Samsung’s June 2021 security maintenance release. The NPU driver could write outside expected memory boundaries, which Samsung describes as allowing arbitrary memory write. Exposure is likely limited to older, unpatched Samsung devices matching the listed Android versions and Exynos chipsets. Organizations with managed mobile fleets should check patch levels rather than assume all Samsung devices are affected. Treat this as a high-priority legacy mobile fleet hygiene issue where affected Samsung devices remain in use. The main business risk is unpatched device exposure, not confirmed active exploitation from the provided sources. Mitigation focus: Update affected devices to Samsung SMR JUN-2021 Release 1 or later.; Check Samsung’s June 2021 advisory for device-specific update availability.; Retire or isolate devices that cannot receive the fixed security release..
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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Open ATT&CK lookupCVE-2021-25407 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=6CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.