CVE-2020-8349

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-14 · updated 2026-06-17
Weakness: CWE-20

Description

An internal security review has identified an unauthenticated remote code execution vulnerability in Cloud Networking Operating System (CNOS)’ optional REST API management interface. This interface is disabled by default and not vulnerable unless enabled. When enabled, it is only vulnerable where attached to a VRF and as allowed by defined ACLs. Lenovo strongly recommends upgrading to a non-vulnerable CNOS release. Where not possible, Lenovo recommends disabling the REST API management interface or restricting access to the management VRF and further limiting access to authorized management stations via ACL.

Affected products

Lenovo Cloud Networking Operating System (CNOS): before 10.10.6.0 — fixed in 10.10.6.0

How to fix

Upgrade to a fixed version: Lenovo Cloud Networking Operating System (CNOS) 10.10.6.0. Check the vendor advisory for mitigations.

References

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