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CriticalKEV

CVE-2021-1497 — Cisco HyperFlex HX Command Injection Vulnerabilities

CVE-2021-1497 · Cisco HyperFlex HX Data Platform · CVSS 9.8 · KEV

In brief

Severity · CVSS
Critical9.8CVSS 3.1, Critical
EPSS
100%
CISA KEV
Known exploited, listed since 3 Nov 2021
CERT-FR
No advisory or alert referenced in the catalog
Vendor
Cisco
Published · Modified
·
Last verified

Summary

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.

Weakness: CWE-78

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

2 branches with a published fixed release · 1 branch to migrate

Cisco HyperFlex HX Data Platform

Source: cisco-sa-hyperflex-rce-TjjNrkpR

  1. 4.5
    Affected versionsListed as affected, releases not specified
    First fixed release4.5(2a)
  2. before 4.0
    Affected versionsListed as affected, releases not specified
    First fixed releaseMigration to a fixed release requiredTarget: 4.0(2e) or later
  3. 4.0
    Affected versionsListed as affected, releases not specified
    First fixed release4.0(2e)

Remediation

Fix available

Vendor fix

  • HyperFlex HX Data Platform 4.54.5(2a)
  • HyperFlex HX Data Platform 4.04.0(2e)

Upgrade to a fixed release listed above for your branch, or to a later fixed release the vendor explicitly supports.

Branches without a fix of their own: migrate to a fixed release

  • HyperFlex HX Data Platform 4.0 → 4.0(2e)

Cisco has released updates that fix this vulnerability; its advisory lists them.

SourceCisco Security Advisory cisco-sa-hyperflex-rce-TjjNrkpR

Workarounds (vendor)

Cisco states in its advisory that no workaround is available.

SourceCisco Security Advisory cisco-sa-hyperflex-rce-TjjNrkpR

CISA KEV required action

Apply updates per vendor instructions.

CISA due date:

SourceCISA KEV

Last verified 1 Oct 2026 at 09:30 UTC

Known exploitation

Added to CISA KEV on 3 Nov 2021

Federal remediation due date: 17 Nov 2021

The CISA required action is shown under Remediation.

100% probability of exploitation in the next 30 days (percentile 100%).

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

CERT-FR

No CERT-FR advisory or alert of the last two years references this CVE, for the vendors Patcharo covers.

Timeline

  1. Published by the source
  2. Added to CISA KEV
  3. CISA remediation due date
  4. Source record last modified
  5. EPSS score computed
  6. Last verified by Patcharo

Official sources

Vendor advisory

References

Cisco · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS · Cisco Security Advisory cisco-sa-hyperflex-rce-TjjNrkpR

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: Cisco Secure Firewall release trains: Threat Defense, Management Center and ASA versions explained