Is CVE-2021-1497 in the CISA KEV catalog?

Yes. CVE-2021-1497 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2021-1497?

CVE-2021-1497 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-1497?

CVE-2021-1497 has an EPSS score of 99.93% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-1497?

Upgrade hyperflex hx data platform to 4.5(2a) or later.

CVE & CISA-KEV Catalog

CVE-2021-1497

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-78OS Command Injection

How to fix

Remediation Available

hyperflex hx data platformNVD

Affected:>= 4.5, < 4.5(2a)Fixed in:4.5(2a)CVE-2021-1497derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.93%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Cisco HyperFlex HX Installer Virtual Machine 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 root user.

Apply updates per vendor instructions.

Remediation due: 2021-11-17

References

Exploit1

packetstormsecurity.com

Vendor Advisory1

tools.cisco.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-28.