CVE-2026-20408_CVE-2026-20408

8 / 10

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-20408

Source MediaTek

Published Feb 2, 2026 at 08:14

Modified Feb 2, 2026 at 14:09

Affected Product

Vendor MediaTek, Inc.

Product MT6890, MT7615, MT7915, MT7916, MT7981, MT7986

Version SDK release 7.6.7.2 and before / openWRT 19.07, 21.02, 23.05

Affected Versions MediaTek, Inc. MT6890, MT7615, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / openWRT 19.07, 21.02, 23.05

CWE Classification

CWE-122

References

corp.mediatek.com /product-security-bulletin/February-2026

{
    "lastseen": "",
    "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.",
    "published": "2026-02-02T08:14:56.694Z",
    "modified": "2026-02-02T14:09:09.462Z",
    "type": "cve",
    "title": "CVE-2026-20408",
    "source": "MediaTek",
    "references": "https://corp.mediatek.com/product-security-bulletin/February-2026",
    "id": "CVE-2026-20408",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "MediaTek, Inc. MT6890, MT7615, MT7915, MT7916, MT7981, MT7986 SDK release 7.6.7.2 and before / openWRT 19.07, 21.02, 23.05",
    "sourceHref": "",
    "cvss": {
        "score": 8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "MT6890, MT7615, MT7915, MT7916, MT7981, MT7986",
    "version": "SDK release 7.6.7.2 and before / openWRT 19.07, 21.02, 23.05",
    "vendor": "MediaTek, Inc.",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}