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

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).

Published: 2019-02-21 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-1664 is rated Moderate Risk (51.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.40%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-1664

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-04-13 0.49% 0.40% -0.10%
2 2025-03-19 0.30% 0.49% +0.19%
3 2025-03-17 — 0.30% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-1664

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
8.1 3.0 HIGH
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.4 6.0 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2019-1664

Affected software / configurations for CVE-2019-1664

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

References for CVE-2019-1664

cvelogic Threat Intelligence