What is CVE-2026-20496?

CVE-2026-20496 is a medium-severity vulnerability in Mediatek Mt6983 Firmware, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2026-08-03.

How severe is CVE-2026-20496?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Out-of-bounds Read in Mediatek Mt6983 Firmware

CVE-2026-20496

In geniezone, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11036877; Issue ID: MSV-7132.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mediatek Mt6983_firmware
Mediatek Mt8676_firmware
Mediatek Mt8678_firmware
Mediatek Mt8755_firmware
Mediatek Mt8768_firmware
Mediatek Mt8771_firmware
Mediatek Mt8775_firmware
Mediatek Mt8781_firmware
Mediatek Mt8786_firmware
Mediatek Mt8791t_firmware

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20496?: CVE-2026-20496 is a medium-severity vulnerability in Mediatek Mt6983 Firmware, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2026-08-03.
How severe is CVE-2026-20496?: Medium severity. CVSS v3 base score is 4.4 out of 10.