Buffer overflow in Mediatek Mt6890
CVE-2025-20646
In wlan AP FW, there is a possible out of bounds write due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Pat…
Vulnerability class: Buffer Overflow
EPSS: 0.008 (53.2th 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 Mt7915
- Mediatek Mt7916
- Mediatek Mt7981
- Mediatek Mt7986
- Mediatek Software_development_kit
- Mediatek, Inc. Mt6890, Mt7915, Mt7916, Mt7981, Mt7986 — versions SDK release 7.6.7.2 and before
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mediatek.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20646?
- CVE-2025-20646 is a critical-severity vulnerability in Mediatek Mt6890, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-03-03.
- How severe is CVE-2025-20646?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-20646 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.