Medium severity · published Feb 2, 2026
CVE-2026-20419
In wlan AP/STA firmware, there is a possible system becoming irresponsive due to an uncaught exception
6.5
CVSS
0.8%
EPSS
No
On KEV
Description
In wlan AP/STA firmware, there is a possible system becoming irresponsive due to an uncaught exception. This could lead to remote (proximal/adjacent) denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461663 / WCNCR00463309; Issue ID: MSV-4852.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nbiot Sdk · Mediatek
through 3.6 · source: NVD
OP
Openwrt · Openwrt
19.07.0; 21.02.0 · source: NVD
SD
Software Development Kit · Mediatek
through 7.6.7.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20419
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20419
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/February-2026
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