High severity · published Mar 2, 2026
CVE-2026-20430
In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check
8.8
CVSS
0.2%
EPSS
No
On KEV
Description
In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check. 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: WCNCR00467553; Issue ID: MSV-5151.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT6890; MT7915; MT7916; MT7981; MT7986 · source: vendor
OP
Openwrt · Openwrt
19.07.0; 21.02.0; 23.05.0 · source: NVD
SD
Software Development Kit · Mediatek
through 7.6.7.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20430
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20430
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/March-2026
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