Buffer overflow in Mediatek Mt6890
CVE-2025-20734
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 if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: WCNCR00441507; Issue ID: MSV-4112.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Mediatek Mt6890
- Mediatek Mt7615
- Mediatek Mt7622
- Mediatek Mt7663
- Mediatek Mt7915
- Mediatek Mt7916
- Mediatek Mt7981
- Mediatek Mt7986
- Mediatek Software_development_kit
- Mediatek, Inc. Mt6890, Mt7615, Mt7622, Mt7663, Mt7915, Mt7916, Mt7981, Mt7986 — versions SDK release 7.6.7.2 and before / openWRT 19.07, 21.02
Weakness classification (CWE)
References
- security@mediatek.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20734?
- CVE-2025-20734 is a medium-severity vulnerability in Mediatek Mt6890, classified under Heap-based Buffer Overflow. CVSS score: 5.3/10. Published 2025-11-04.
- How severe is CVE-2025-20734?
- Medium severity. CVSS v3 base score is 5.3 out of 10.