High severity · published Oct 14, 2025
CVE-2025-20709
In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check
8.8
CVSS
0.3%
EPSS
No
On KEV
Description
In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00415809; Issue ID: MSV-3405.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
MT6890, MT7915, MT7916, MT7981, MT7986 · MediaTek, Inc.
SDK release 7.6.7.2 and before / OpenWrt 19.07, 21.02 (MT6890) · source: vendor
OP
Openwrt · Openwrt
19.07.0; 21.02.0 · source: NVD
SD
Software Development Kit · Mediatek
through 7.6.7.2 · source: NVD
Affected product
MM
MT6890, MT7915, MT7916, MT7981, MT7986
MediaTek, Inc.
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-20709
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-20709
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/October-2025
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