How severe is CVE-2026-20446?

CVE-2026-20446 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-20446 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20446?

CVE-2026-20446 affects Mediatek Mt6813 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20446?

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

Does CVE-2026-20446 have an EU (EUVD) identifier?

Yes. CVE-2026-20446 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19569.

When was CVE-2026-20446 published?

CVE-2026-20446 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-20446

CVE-2026-20446 is a medium-severity vulnerability in Mediatek Mt6813 Firmware with a CVSS 3.x base score of 4.3. 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 4.3)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19569
Weakness: CWE-787
Affected product: Mediatek Mt6813 Firmware
Published: 2026-04-07
Last modified: 2026-06-17

Description

In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.

Frequently asked questions

What is CVE-2026-20446?: In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.
How severe is CVE-2026-20446?: CVE-2026-20446 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-20446 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20446?: CVE-2026-20446 affects Mediatek Mt6813 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20446?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20446 have an EU (EUVD) identifier?: Yes. CVE-2026-20446 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19569.
When was CVE-2026-20446 published?: CVE-2026-20446 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://corp.mediatek.com/product-security-bulletin/April-2026

Affected products (1)

cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*

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