Critical severity · published Feb 2, 2026
CVE-2026-20407
In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check
9.3
CVSS
0.2%
EPSS
No
On KEV
Description
In wlan STA driver, there is a possible escalation of privilege 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: WCNCR00464377; Issue ID: MSV-4905.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nbiot Sdk · Mediatek
through 3.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20407
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20407
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/February-2026
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