What is CVE-2026-20452?

CVE-2026-20452 is a high-severity vulnerability in Mediatek Mt6890, classified under Heap-based Buffer Overflow. CVSS score: 8.0/10. Published 2026-06-01.

How severe is CVE-2026-20452?

High severity. CVSS v3 base score is 8.0 out of 10.

Buffer overflow in Mediatek Mt6890

CVE-2026-20452

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Pa…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (6.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mediatek Mt6890
Mediatek Mt6890_firmware
Mediatek Mt7615
Mediatek Mt7615_firmware
Mediatek Mt7915
Mediatek Mt7915_firmware
Mediatek Mt7916
Mediatek Mt7916_firmware
Mediatek Mt7981
Mediatek Mt7981_firmware

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20452?: CVE-2026-20452 is a high-severity vulnerability in Mediatek Mt6890, classified under Heap-based Buffer Overflow. CVSS score: 8.0/10. Published 2026-06-01.
How severe is CVE-2026-20452?: High severity. CVSS v3 base score is 8.0 out of 10.