What’s Vulnerable › Vulnerabilities
CVE-2021-3626: Windows version of Multipass unauthenticated localhost tcp control socket can perform mounts
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-10-01 · updated 2026-06-17
- Weakness: CWE-73
Description
The Windows version of Multipass before 1.7.0 allowed any local process to connect to the localhost TCP control socket to perform mounts from the operating system to a guest, allowing for privilege escalation.
Affected products
- Canonical Multipass: before 1.7.0 — fixed in 1.7.0
How to fix
Upgrade to a fixed version: Canonical Multipass 1.7.0. Check the vendor advisory for mitigations.
References
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