How severe is CVE-2025-20656?

CVE-2025-20656 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-20656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-20656?

CVE-2025-20656 primarily affects Mediatek Mt6781. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-20656?

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

Does CVE-2025-20656 have an EU (EUVD) identifier?

Yes. CVE-2025-20656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9974.

When was CVE-2025-20656 published?

CVE-2025-20656 was published on 2025-04-07 and last updated on 2026-06-17.

CVE-2025-20656

CVE-2025-20656 is a medium-severity vulnerability in Mediatek Mt6781 with a CVSS 3.x base score of 6.8. 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 6.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9974
Weakness: CWE-787
Affected product: Mediatek Mt6781
Published: 2025-04-07
Last modified: 2026-06-17

Description

In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09625423; Issue ID: MSV-3033.

Frequently asked questions

What is CVE-2025-20656?: In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09625423; Issue ID: MSV-3033.
How severe is CVE-2025-20656?: CVE-2025-20656 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-20656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-20656?: CVE-2025-20656 primarily affects Mediatek Mt6781. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-20656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-20656 have an EU (EUVD) identifier?: Yes. CVE-2025-20656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9974.
When was CVE-2025-20656 published?: CVE-2025-20656 was published on 2025-04-07 and last updated on 2026-06-17.

References

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

Affected products (24)

cpe:2.3:a:linuxfoundation:yocto:4.0:*:*:*:*:*:*:*
cpe:2.3:a:rdkcentral:rdk-b:2024q1:*:*:*:*:*:*:*
cpe:2.3:o:google:android:12.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:23.05:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6781:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6789:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6835:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6855:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6878:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6879:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6886:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6895:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6897:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6983:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6985:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6989:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8196:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8370:-:*:*:*:*:*:*:*
cpe:2.3:h:mediatek:mt8390:-:*:*:*:*:*:*:*

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