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CVE-2025-20681

Mediatek Software Development Kit buffer overflow

9.8 CRITICALEPSS 0.61%
  1. Published8 Jul 2025

Description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00416936; Issue ID: MSV-3446.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mediatek Software Development Kit≤ 5.1.0.0
Openwrt19.07.0 · 21.02.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2025-20681 being actively exploited?

CVE-2025-20681 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.61%.

How severe is CVE-2025-20681?

CVE-2025-20681 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.61% probability of exploitation.

Which products are affected by CVE-2025-20681?

Affected products include Mediatek Software Development Kit, Openwrt.

How do I fix CVE-2025-20681?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-20681 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.