How severe is CVE-2025-20731?

CVE-2025-20731 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-20731 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20731?

CVE-2025-20731 primarily affects Mediatek Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20731?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-20731 have an EU (EUVD) identifier?

Yes. CVE-2025-20731 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37574.

When was CVE-2025-20731 published?

CVE-2025-20731 was published on 2025-11-04 and last updated on 2026-06-17.

CVE-2025-20731

CVE-2025-20731 is a medium-severity vulnerability in Mediatek Software Development Kit with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37574
Weakness: CWE-787
Affected product: Mediatek Software Development Kit
Published: 2025-11-04
Last modified: 2026-06-17

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 if a malicious actor has already obtained the System privilege (when OceReducedNeighborReport is disabled). User interaction is not needed for exploitation. Patch ID: WCNCR00441511; Issue ID: MSV-4140.

Frequently asked questions

What is CVE-2025-20731?: 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 if a malicious actor has already obtained the System privilege (when OceReducedNeighborReport is disabled). User interaction is not needed for exploitation. Patch ID: WCNCR00441511; Issue ID: MSV-4140.
How severe is CVE-2025-20731?: CVE-2025-20731 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-20731 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20731?: CVE-2025-20731 primarily affects Mediatek Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20731?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20731 have an EU (EUVD) identifier?: Yes. CVE-2025-20731 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37574.
When was CVE-2025-20731 published?: CVE-2025-20731 was published on 2025-11-04 and last updated on 2026-06-17.

References

https://corp.mediatek.com/product-security-bulletin/November-2025

Affected products (3)

cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*

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