CVE-2025-20724VulnerabilityPublished 14 Oct 2025

CVE-2025-20724: MediaTek MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 · Out-of-bounds Read

Affects MediaTek MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986Source CVE Database V5

Not known to be exploited · CVSS 5.5 Medium : upgrade to 19.07 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 19.07

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade MediaTek MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 to 19.07.

Affected software

Product	Affected	Fixed in
MediaTek, Inc. MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986	Affected <19.07	Fixed in 19.07

AI-suggested

1. Apply the vendor-provided patch WCNCR00418894 as soon as it becomes available to affected devices and SDKs. 2. For devices running openWRT 19.07 or 21.02 on MT6890 chipsets, upgrade to versions incorporating the fix or apply vendor patches. 3. Restrict local user access to devices running affected MediaTek chipsets, enforcing strict access controls and monitoring for unauthorized logins. 4. Implement network segmentation to limit exposure of vulnerable devices to untrusted users or networks. 5. Employ host-based intrusion detection systems (HIDS) to detect anomalous local activities that could indicate exploitation attempts. 6. Regularly audit and update firmware and drivers on embedded devices and wireless infrastructure to maintain security posture. 7. Educate administrators and users about the risks of local privilege exploitation and enforce least privilege principles. 8.

Description

CVE-2025-20724 is a medium-severity vulnerability in MediaTek WLAN AP drivers affecting multiple chipsets including MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, and MT7986. It involves an out-of-bounds read due to improper bounds checking, potentially allowing local attackers with user privileges to disclose sensitive information. Exploitation does not require user interaction but does require local user execution privileges. The vulnerability affects SDK releases up to 7.6.7.2 and certain openWRT versions for MT6890. No known exploits are currently in the wild, and a patch has been identified but not linked. The CVSS score is 5.5, reflecting a medium risk primarily due to confidentiality impact without integrity or availability compromise.

Impact

For European organizations, the primary impact of CVE-2025-20724 is the potential local disclosure of sensitive information on devices using affected MediaTek chipsets. This could include wireless access points, routers, or embedded IoT devices prevalent in enterprise and industrial environments. Confidentiality breaches could expose cryptographic keys, configuration data, or user credentials, increasing the risk of further compromise. Since exploitation requires local user privileges, the threat is heightened in environments where untrusted users have physical or shell access to devices, such as shared offices, managed service providers, or multi-tenant data centers. The lack of integrity or availability impact limits the risk of service disruption or data manipulation. However, information disclosure can facilitate lateral movement or privilege escalation in complex networks. Given the widespread use of MediaTek chipsets in networking hardware, European organizations relying on these devices should consider this vulnerability a moderate risk, especially in sectors with sensitive data or critical infrastructure.

CWE-125Out-of-bounds Read (opens in a new tab)
Base weaknessCWE Top 25 (2025): #8
The product reads data past the end, or before the beginning, of the intended buffer.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design · Language Selection
Use a language that provides appropriate memory abstractions.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Overread Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

corp.mediatek.com/product-security-bulletin/October-2025 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 21 Oct 2025, 12:04 UTC

WeaknessesCWE-125

Technical details

References

Community reviews

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