CVE-2026-20408 Details
Description
In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461651; Issue ID: MSV-4758.
A heap buffer overflow vulnerability has been identified in the WLAN component of certain MediaTek chipsets, including the MT6890, MT7615, MT7915, MT7916, MT7981, and MT7986. This vulnerability allows for an out-of-bounds write, which could lead to remote (proximal/adjacent) escalation of privilege. Exploitation does not require additional execution privileges or user interaction.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 3, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://corp.mediatek.com/product-security-bulletin/February-2026 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mediatek software development kit | <= 7.6.7.2 |
CPE
Remediation
| |
| openwrt openwrt | 19.07.0 - 21.02.0 - 23.05.0 - |
CPE
Remediation
| |
| mediatek mt6890 | All versions |
CPE
Remediation
| |
| mediatek mt7615 | All versions |
CPE
Remediation
| |
| mediatek mt7915 | All versions |
CPE
Remediation
| |
| mediatek mt7916 | All versions |
CPE
Remediation
| |
| mediatek mt7981 | All versions |
CPE
Remediation
| |
| mediatek mt7986 | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 4, 2026 | Initial Analysis | [email protected] |
| Feb 3, 2026 | CVE Modified | CISA-ADP |
| Feb 2, 2026 | CVE Modified | CISA-ADP |
| Feb 2, 2026 | New CVE Received | [email protected] |