How severe is CVE-2026-20419?

CVE-2026-20419 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-20419 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20419?

CVE-2026-20419 primarily affects Mediatek Nbiot Sdk. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-20419?

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

Does CVE-2026-20419 have an EU (EUVD) identifier?

Yes. CVE-2026-20419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5135.

When was CVE-2026-20419 published?

CVE-2026-20419 was published on 2026-02-02 and last updated on 2026-06-17.

CVE-2026-20419

CVE-2026-20419 is a medium-severity vulnerability in Mediatek Nbiot Sdk with a CVSS 3.x base score of 6.5. 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-754.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5135
Weakness: CWE-754
Affected product: Mediatek Nbiot Sdk
Published: 2026-02-02
Last modified: 2026-06-17

Description

In wlan AP/STA firmware, there is a possible system becoming irresponsive due to an uncaught exception. This could lead to remote (proximal/adjacent) denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461663 / WCNCR00463309; Issue ID: MSV-4852.

Frequently asked questions

What is CVE-2026-20419?: In wlan AP/STA firmware, there is a possible system becoming irresponsive due to an uncaught exception. This could lead to remote (proximal/adjacent) denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461663 / WCNCR00463309; Issue ID: MSV-4852.
How severe is CVE-2026-20419?: CVE-2026-20419 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-20419 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20419?: CVE-2026-20419 primarily affects Mediatek Nbiot Sdk. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-20419?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20419 have an EU (EUVD) identifier?: Yes. CVE-2026-20419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5135.
When was CVE-2026-20419 published?: CVE-2026-20419 was published on 2026-02-02 and last updated on 2026-06-17.

References

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

Affected products (4)

cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:*
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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