CVE-2026-20423

Out-of-Bounds Write in Mediatek WLAN STA Driver Leads to Local Privilege Escalation

Published Mar 2, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Out-of-Bounds Write in Mediatek WLAN STA Driver Leads to Local Privilege Escalation
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mediatek
Mediatek mt7902
Mediatek mt7920
Mediatek mt7921
Mediatek mt7922
Mediatek mt7925
Mediatek mt7927
Mediatek nbiot Sdk
Weaknesses CWE-787
CPEs cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:*
Vendors & Products Mediatek
Mediatek mt7902
Mediatek mt7920
Mediatek mt7921
Mediatek mt7922
Mediatek mt7925
Mediatek mt7927
Mediatek nbiot Sdk
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.
Weaknesses CWE-749
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
MediaTek
Published
Updated
Mar 30, 2026, 1:05 PM
Reserved
Nov 3, 2025, 1:30 AM
Status
Modified
Published
Mar 2, 2026, 9:16 AM
Modified
Jun 17, 2026, 10:17 AM