CVE-2026-20418
CVE-2026-20418 is a critical-severity vulnerability in Google Matter with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 0% (25th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-5134
- Weakness: CWE-787
- Affected product: Google Matter
- Published:
- Last modified:
Description
In Thread, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465153; Issue ID: MSV-4927.
Frequently asked questions
- What is CVE-2026-20418?
- In Thread, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465153; Issue ID: MSV-4927.
- How severe is CVE-2026-20418?
- CVE-2026-20418 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-20418 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-20418?
- CVE-2026-20418 affects Google Matter. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-20418?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-20418 have an EU (EUVD) identifier?
- Yes. CVE-2026-20418 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5134.
- When was CVE-2026-20418 published?
- CVE-2026-20418 was published on 2026-02-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:google:matter:*:*:*:*:*:*:*:*
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