CVE-2021-1498

Cisco HyperFlex HX Command Injection Vulnerabilities

9.8 CriticalIn KEVPublic exploit

Multiple vulnerabilities in the web-based management interface of Cisco HyperFlex HX could allow an unauthenticated, remote attacker to perform command injection attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

100.0%Up 99.4 points since May 7, 2021

What each source reports

CVE List Score used 9.8

Cisco HyperFlex HX Command Injection Vulnerabilities

Record: CVE-2021-1498
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

EUVDEUVD-2021-6965 9.8

Record: EUVD-2021-6965
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-h6vv-5xx4-c25q 9.8

Multiple vulnerabilities in the web-based management interface of Cisco HyperFlex HX could allow...

Record: GHSA-h6vv-5xx4-c25q
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-77, CWE-78
Updated: 2026-11-02

CISA KEV No score

Cisco HyperFlex HX Data Platform Command Injection Vulnerability

Cisco HyperFlex HX Installer Virtual Machine contains an insufficient input validation vulnerability which could allow an attacker to execute commands on an affected device as the tomcat8 user.

Record: CVE-2021-1498
Weakness: CWE-78
Updated: 2026-11-02

NVD 9.8

Record: CVE-2021-1498
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-78, CWE-77
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	Cisco HyperFlex HX Data Platform Command Execution	2021-05-05
Nuclei	Cisco HyperFlex HX Data Platform - Remote Command Execution

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-1498 is a critical vulnerability (CVSS 9.8) in Cisco Hyperflex Hx, published May 6, 2021. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 100.0%, the 99th percentile. No source names a fixed version.