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. Patch ID: WCNCR00389074; Issue ID: MSV-1803.
Vulnerability class: Buffer Overflow
Published · last modified .
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: 0.009 (57.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
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
- corp.mediatek.com/product-security-bulletin/March-2025 (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.