MediaTek MT6890/MT7915/MT7916/MT7981/MT7986 WLAN AP Driver heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in MediaTek MT6890, MT7915, MT7916, MT7981 and MT7986. It has been classified as critical. This affects an unknown function of the component WLAN AP Driver. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2025-20686. The attack can only be initiated within the local network. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in MediaTek MT6890, MT7915, MT7916, MT7981 and MT7986 and classified as critical. This issue affects an unknown code block of the component WLAN AP Driver. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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) code execution with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00415570; Issue ID: MSV-3404.

The advisory is shared at corp.mediatek.com. The identification of this vulnerability is CVE-2025-20686 since 11/01/2024. The exploitation is known to be easy. Access to the local network is required for this attack. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Applying the patch MSV-3404 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: MSV-3404

Timelineinfo

11/01/2024 CVE reserved
07/08/2025 +248 days Advisory disclosed
07/08/2025 +0 days VulDB entry created
07/08/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: MSV-3404
Status: Confirmed

CVE: CVE-2025-20686 (🔒)
GCVE (CVE): GCVE-0-2025-20686
GCVE (VulDB): GCVE-100-315257

Entryinfo

Created: 07/08/2025 07:27
Changes: 07/08/2025 07:27 (56)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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