How severe is CVE-2026-20435?

CVE-2026-20435 has a CVSS 3.x base score of 4.6, 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 none, and availability none.

Is CVE-2026-20435 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-2026-20435?

CVE-2026-20435 primarily affects Linuxfoundation Yocto. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-20435?

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

Does CVE-2026-20435 have an EU (EUVD) identifier?

Yes. CVE-2026-20435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9160.

When was CVE-2026-20435 published?

CVE-2026-20435 was published on 2026-03-02 and last updated on 2026-06-17.

CVE-2026-20435

CVE-2026-20435 is a medium-severity vulnerability in Linuxfoundation Yocto with a CVSS 3.x base score of 4.6. 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-522.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9160
Weakness: CWE-522
Affected product: Linuxfoundation Yocto
Published: 2026-03-02
Last modified: 2026-06-17

Description

In preloader, there is a possible read of device unique identifiers due to a logic error. This could lead to local information disclosure, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10607099; Issue ID: MSV-6118.

Frequently asked questions

What is CVE-2026-20435?: In preloader, there is a possible read of device unique identifiers due to a logic error. This could lead to local information disclosure, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10607099; Issue ID: MSV-6118.
How severe is CVE-2026-20435?: CVE-2026-20435 has a CVSS 3.x base score of 4.6, 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 none, and availability none.
Is CVE-2026-20435 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-2026-20435?: CVE-2026-20435 primarily affects Linuxfoundation Yocto. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-20435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20435 have an EU (EUVD) identifier?: Yes. CVE-2026-20435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9160.
When was CVE-2026-20435 published?: CVE-2026-20435 was published on 2026-03-02 and last updated on 2026-06-17.

References

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

Affected products (9)

cpe:2.3:a:linuxfoundation:yocto:4.0:*:*:*:*:*:*:*
cpe:2.3:a:rdkcentral:rdk-b:2022q3:*:*:*:*:*:*:*
cpe:2.3:a:rdkcentral:rdk-b:2024q1:*:*:*:*:*:*:*
cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:16.0:-:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*
cpe:2.3:o:openwrt:openwrt:23.05.0:-:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:3.7.0:-:*:*:*:*:*:*

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