What is CVE-2026-20419?

CVE-2026-20419 is a medium-severity vulnerability in Mediatek Mt6890, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.5/10. Published 2026-02-02.

How severe is CVE-2026-20419?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Mediatek Mt6890

CVE-2026-20419

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…

EPSS: 0.007 (49.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mediatek Mt6890
Mediatek Mt6989tb
Mediatek Mt7902
Mediatek Mt7915
Mediatek Mt7916
Mediatek Mt7920
Mediatek Mt7921
Mediatek Mt7922
Mediatek Mt7925
Mediatek Mt7927

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20419?: CVE-2026-20419 is a medium-severity vulnerability in Mediatek Mt6890, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.5/10. Published 2026-02-02.
How severe is CVE-2026-20419?: Medium severity. CVSS v3 base score is 6.5 out of 10.