How severe is CVE-2026-20454?

CVE-2026-20454 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-20454 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20454?

CVE-2026-20454 primarily affects Mediatek Mt8673 Firmware. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-20454?

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

Does CVE-2026-20454 have an EU (EUVD) identifier?

Yes. CVE-2026-20454 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33543.

When was CVE-2026-20454 published?

CVE-2026-20454 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-20454

CVE-2026-20454 is a medium-severity vulnerability in Mediatek Mt8673 Firmware with a CVSS 3.x base score of 6.4. 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-367.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33543
Weakness: CWE-367
Affected product: Mediatek Mt8673 Firmware
Published: 2026-06-01
Last modified: 2026-06-17

Description

In geniezone, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10873936; Issue ID: MSV-6786.

Frequently asked questions

What is CVE-2026-20454?: In geniezone, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10873936; Issue ID: MSV-6786.
How severe is CVE-2026-20454?: CVE-2026-20454 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-20454 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20454?: CVE-2026-20454 primarily affects Mediatek Mt8673 Firmware. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-20454?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20454 have an EU (EUVD) identifier?: Yes. CVE-2026-20454 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33543.
When was CVE-2026-20454 published?: CVE-2026-20454 was published on 2026-06-01 and last updated on 2026-06-17.

References

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

Affected products (36)

cpe:2.3:o:mediatek:mt8673_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8765_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8766_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8768_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8781_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8786_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8788_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8791t_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8793_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8797_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8798_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt8910_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6991_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6989_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6985_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6983_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6899_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6897_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6895_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6893_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6889_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6886_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6885_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6883_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6879_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6878_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6877_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6855_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6853_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6835_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6789_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6781_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6768_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6765_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6761_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:mediatek:mt6739_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Mediatek Mt8673 Firmware

CVE-2026-20433 — High (CVSS 8.8): In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation…
CVE-2026-20432 — High (CVSS 8.0): In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation…
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