CVE-2025-66627
8.4 · HIGHOverview
CVE-2025-66627 is a high-severity vulnerability affecting wasmi-labs wasmi. It was published on December 9, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory growth conditions. This issue potentially leads to memory corruption, information disclosure, or code execution. This issue is fixed in versions 0.41.2, 0.47.1, 0.51.3 and 1.0.1. To workaround this issue, consider limiting the maximum linear memory sizes where feasible.
Remediation
Check the references section for vendor advisories and patches from wasmi-labs. Update wasmi to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| wasmi-labs | wasmi | >= 0.41.0, < 0.41.2 | Affected |
Frequently Asked Questions
What is CVE-2025-66627?
CVE-2025-66627 is a high-severity vulnerability affecting wasmi-labs wasmi. It was published on December 9, 2025 and has a CVSS 3.1 base score of 8.4 (HIGH).
How severe is CVE-2025-66627?
This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-66627?
Check the references section for vendor advisories and patches from wasmi-labs. Update wasmi to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66627?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66627 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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