CVE-2025-20646: mediatek, inc. mt6890, mt7915, mt7916, mt7981, mt7986 Out-of-bounds Write
CVSS: 9.8v3.1CriticalAnalyzed
Published 03-03-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-20646 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in mediatek, inc. mt6890, mt7915, mt7916, mt7981, mt7986. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 58.4% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.88%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 03-03-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.88%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
0.00 pp
From 0.88% on 20-09-2026
20-09-202620-10-2026
EPSS score0.88%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mediatek1 product
- software_development_kit< 7.6.7.2
Mediatek, inc.1 product
- mt6890, mt7915, mt7916, mt7981, mt7986SDK release 7.6.7.2 and before
2 vendors · 2 products
References
1 links- corp.mediatek.com/product-security-bulletin/March-2025Vendor Advisory