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CVE-2019-1664: Cisco HyperFlex Software Unauthenticated Root Access Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-02-21 · updated 2026-06-17
• Weakness: CWE-284

Description

A vulnerability in the hxterm service of Cisco HyperFlex Software could allow an unauthenticated, local attacker to gain root access to all nodes in the cluster. The vulnerability is due to insufficient authentication controls. An attacker could exploit this vulnerability by connecting to the hxterm service as a non-privileged, local user. A successful exploit could allow the attacker to gain root access to all member nodes of the HyperFlex cluster. This vulnerability affects Cisco HyperFlex Software Releases prior to 3.5(2a).

Affected products

• Cisco HyperFlex HX-Series: 2.6(1a), 2.6(1b), 2.6(1d), 2.6(1e), 3.0(1a), 3.0(1b) (+6)

References

• http://www.securityfocus.com/bid/107103
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-chn-root-access
• http://www.securityfocus.com/bid/107103
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-chn-root-access

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