What is CVE-2025-20680?

CVE-2025-20680 is a critical-severity vulnerability in Mediatek Mt7902, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-07-08.

How severe is CVE-2025-20680?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Mediatek Mt7902

CVE-2025-20680

In Bluetooth driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418044; Issue ID: MSV-3482.

Vulnerability class: Buffer Overflow

Published 2025-07-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001

Affected products

Mediatek Mt7902
Mediatek Mt7920
Mediatek Mt7921
Mediatek Mt7922
Mediatek Mt7925
Mediatek Mt7927
Mediatek Nbiot Sdk
Mediatek, Inc. Mt7902, Mt7920, Mt7921, Mt7922, Mt7925, Mt7927 — versions NB SDK release 3.6 and before

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

corp.mediatek.com/product-security-bulletin/July-2025 (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20680?: CVE-2025-20680 is a critical-severity vulnerability in Mediatek Mt7902, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-07-08.
How severe is CVE-2025-20680?: Critical severity. CVSS v3 base score is 9.8 out of 10.