Security readout for executives and security teams
Plain-English summary
CVE-2026-20410 is a MediaTek imgsys flaw that could let an attacker with existing System-level access gain higher local privileges. It affects specific MediaTek chipsets. This is not a remote, drive-by issue, but it matters for device fleets because successful exploitation could compromise confidentiality, integrity, and availability on affected devices.
Executive priority
Treat as a normal security update priority for affected MediaTek-based devices, not an emergency internet-facing risk. Escalate priority for high-value or unmanaged Android/embedded fleets where attackers may already gain local privileged access through other weaknesses.
Technical view
The issue is an out-of-bounds write in imgsys caused by a missing bounds check, classified as CWE-787. CVSS 3.1 is 6.7 with local attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high CIA impact. MediaTek lists Patch ID ALPS10362552 and Issue ID MSV-5760.
Likely exposure
Exposure is limited to devices using affected MediaTek chipsets: MT6897, MT6989, MT8370, MT8390, and MT8395. The CVE record marks other versions as unaffected by default. Actual organizational exposure depends on OEM device models and firmware builds incorporating these chipsets.
Exploitation context
Sources state exploitation requires a malicious actor to already have System privilege and needs no user interaction. The source bundle does not identify public exploit availability or active exploitation, and it is not listed as KEV.
Researcher notes
Evidence is limited to the CVE record and MediaTek bulletin reference. No affected OEM models, kernel branches, proof-of-concept status, or detailed remediation instructions are provided in the source bundle. Focus research on firmware provenance, imgsys component presence, and OEM patch mapping.
Mitigation direction
- Check MediaTek’s February 2026 bulletin for vendor guidance and patch availability.
- Prioritize OEM firmware updates that include Patch ID ALPS10362552.
- Inventory devices for the listed MediaTek chipsets and firmware support status.
- Restrict deployment of affected devices where timely OEM updates are unavailable.
Validation and detection
- Map managed devices to chipset models MT6897, MT6989, MT8370, MT8390, and MT8395.
- Confirm OEM firmware release notes reference CVE-2026-20410 or ALPS10362552.
- Verify deployed firmware dates are after the applicable vendor security update.
- Track exceptions where OEMs have not published a matching update.
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-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-20410 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
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/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.
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:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://corp.mediatek.com/product-security-bulletin/February-2026CVE 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.
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.