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CVE-2021-1497

Cisco HyperFlex HX Installer Virtual Machine Command Injection

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 99.9%
  1. Published6 May 2021
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due17 Nov 2021
Actively exploited (CISA KEV)

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.

Added to KEV: 3 Nov 2021Federal remediation due: 17 Nov 2021

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Cisco Hyperflex Hx Data Platform≥ 4.5 < 4.5\(2a\) · < 4.0\(2e\)

Remediation

Fixed in
Cisco Hyperflex Hx Data Platform≥ 4.5\(2a\)

References

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Frequently asked

Is CVE-2021-1497 being actively exploited?

Yes. CVE-2021-1497 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2021-1497?

CVE-2021-1497 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 99.9% probability of exploitation.

Which products are affected by CVE-2021-1497?

Affected products include Cisco Hyperflex Hx Data Platform.

How do I fix CVE-2021-1497?

Upgrade affected software to a fixed version, for example Cisco Hyperflex Hx Data Platform 4.5\(2a\) or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-1497 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.