Buffer overflow in Mediatek Mt6890
CVE-2025-20681
In wlan AP 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…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Mediatek Mt6890
- Mediatek Mt7615
- Mediatek Mt7622
- Mediatek Mt7663
- Mediatek Mt7915
- Mediatek Software_development_kit
- Mediatek, Inc. Mt6890, Mt7615, Mt7622, Mt7663, Mt7915 — versions SDK release 5.1.0.0 and before / openWRT 19.07, 21.02
- Openwrt — versions 19.07.0, 21.02.0
Weakness classification (CWE)
References
- security@mediatek.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20681?
- CVE-2025-20681 is a critical-severity vulnerability in Mediatek Mt6890, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-07-08.
- How severe is CVE-2025-20681?
- Critical severity. CVSS v3 base score is 9.8 out of 10.