How severe is CVE-2018-16766?

CVE-2018-16766 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-16766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16766?

CVE-2018-16766 affects Webassembly Virtual Machine Project Webassembly Virtual Machine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-16766 published?

CVE-2018-16766 was published on 2018-09-10 and last updated on 2026-06-17.

CVE-2018-16766

CVE-2018-16766 is a high-severity vulnerability in Webassembly Virtual Machine Project Webassembly Virtual Machine with a CVSS 3.x base score of 8.8. 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-670.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-670
Affected product: Webassembly Virtual Machine Project Webassembly Virtual Machine
Published: 2018-09-10
Last modified: 2026-06-17

Description

In WAVM through 2018-07-26, a crafted file sent to the WebAssembly Virtual Machine may cause a denial of service (application crash) or possibly have unspecified other impact because Errors::unreachable() is reached.

Frequently asked questions

What is CVE-2018-16766?: In WAVM through 2018-07-26, a crafted file sent to the WebAssembly Virtual Machine may cause a denial of service (application crash) or possibly have unspecified other impact because Errors::unreachable() is reached.
How severe is CVE-2018-16766?: CVE-2018-16766 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-16766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16766?: CVE-2018-16766 affects Webassembly Virtual Machine Project Webassembly Virtual Machine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-16766 published?: CVE-2018-16766 was published on 2018-09-10 and last updated on 2026-06-17.

References

https://github.com/AndrewScheidecker/WAVM/issues/96

Affected products (1)

cpe:2.3:a:webassembly_virtual_machine_project:webassembly_virtual_machine:*:*:*:*:*:*:*:*

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