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CVE-2021-1497 Cisco CVE debrief

CVE-2021-1497 is a Cisco HyperFlex HX Installer Virtual Machine command injection vulnerability that CISA has added to its Known Exploited Vulnerabilities catalog. Because it appears in KEV, organizations using Cisco HyperFlex HX should treat remediation as urgent and follow Cisco’s update guidance without delay.

Vendor
Cisco
Product
HyperFlex HX
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Security and infrastructure teams responsible for Cisco HyperFlex HX deployments, especially administrators managing HyperFlex installers, virtual machine components, and vulnerability remediation workflows.

Technical summary

The CVE record identifies a command injection issue in Cisco HyperFlex HX Installer Virtual Machine. The CISA KEV catalog flags it as a known exploited vulnerability and directs organizations to apply updates per vendor instructions. No CVSS score was provided in the supplied source corpus.

Defensive priority

High. This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, which indicates it should be prioritized for prompt remediation. The KEV entry’s due date is 2021-11-17.

Recommended defensive actions

  • Apply Cisco updates or remediation steps according to vendor instructions as soon as possible.
  • Inventory Cisco HyperFlex HX deployments to confirm whether the affected installer virtual machine component is present.
  • Prioritize this CVE in patch queues and exception reviews because it is listed in CISA KEV.
  • Validate completion against the CISA KEV due date and document remediation status for affected assets.

Evidence notes

Source evidence is limited to official and authoritative references supplied in the corpus: the CVE record and NVD detail page for CVE-2021-1497, plus CISA’s Known Exploited Vulnerabilities catalog/source feed. The CISA KEV metadata supplied here lists Cisco HyperFlex HX as the product, identifies the issue as a command injection vulnerability, marks it as known exploited, and provides a required action of ‘Apply updates per vendor instructions.’ The supplied timeline places publication and KEV addition on 2021-11-03, with a KEV due date of 2021-11-17.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-1497 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-1497

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-1497 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-1497

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.