How severe is CVE-2019-1664?

CVE-2019-1664 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-1664 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1664?

CVE-2019-1664 primarily affects Cisco Hyperflex Hx Data Platform. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1664?

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-2019-1664 published?

CVE-2019-1664 was published on 2019-02-21 and last updated on 2026-06-17.

CVE-2019-1664

CVE-2019-1664 is a high-severity vulnerability in Cisco Hyperflex Hx Data Platform with a CVSS 3.x base score of 7.8. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Hyperflex Hx Data Platform
Published: 2019-02-21
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2019-1664?: 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).
How severe is CVE-2019-1664?: CVE-2019-1664 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-1664 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1664?: CVE-2019-1664 primarily affects Cisco Hyperflex Hx Data Platform. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1664?: 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-2019-1664 published?: CVE-2019-1664 was published on 2019-02-21 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:o:cisco:hyperflex_hx_data_platform:2.6\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:2.6\(1b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:2.6\(1d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:2.6\(1e\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1c\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1e\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1h\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.0\(1i\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:hyperflex_hx_data_platform:3.5\(1a\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Hyperflex Hx Data Platform

CVE-2021-1498 — Critical (CVSS 9.8): Multiple vulnerabilities in the web-based management interface of Cisco HyperFlex HX could allow an unauthenticated,…
CVE-2021-1497 — Critical (CVSS 9.8): Multiple vulnerabilities in the web-based management interface of Cisco HyperFlex HX could allow an unauthenticated,…
CVE-2019-1958 — High (CVSS 8.8): A vulnerability in the web-based management interface of Cisco HyperFlex Software could allow an unauthenticated,…
CVE-2018-15380 — High (CVSS 8.8): A vulnerability in the cluster service manager of Cisco HyperFlex Software could allow an unauthenticated, adjacent…
CVE-2018-15382 — High (CVSS 8.6): A vulnerability in Cisco HyperFlex Software could allow an unauthenticated, remote attacker to generate valid, signed…
CVE-2017-12315 — Medium (CVSS 6.0): A vulnerability in system logging when replication is being configured with the Cisco HyperFlex System could allow an…

All CVEs affecting Cisco Hyperflex Hx Data Platform →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →