Uncaught Exception in WLAN AP/STA Firmware Enables Remote DoS
CVE-2026-20419 Published on February 2, 2026
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.
Vulnerability Analysis
Weakness Type
Improper Check for Unusual or Exceptional Conditions
The software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software.
Products Associated with CVE-2026-20419
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Affected Versions
MediaTek, Inc. MediaTek chipset:- Version MT6890 is affected.
- Version MT6989TB is affected.
- Version MT7902 is affected.
- Version MT7915 is affected.
- Version MT7916 is affected.
- Version MT7920 is affected.
- Version MT7921 is affected.
- Version MT7922 is affected.
- Version MT7925 is affected.
- Version MT7927 is affected.
- Version MT7981 is affected.
- Version MT7986 is affected.
- Version MT8196 is affected.
- Version MT8668 is affected.
- Version MT8676 is affected.
- Version MT8678 is affected.
- Version MT8775 is affected.
- Version MT8791T is affected.
- Version MT8792 is affected.
- Version MT8793 is affected.
- Version MT8796 is affected.
- Version MT8873 is affected.
- Version MT8883 is affected.
- Version MT8893 is affected.
- Version MT8910 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.