CVE-2021-1497
CriticalExploitedPublic exploitMultiple 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.
Published Jun 24, 2021 · Updated Oct 21, 2025
Key Facts
Patch immediately- CVE-2021-1497 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Hyperflex Hx Data Platform (Cisco).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 6, 2021. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Hyperflex Hx Data Platform 4.0\(2e\).
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-1497 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | Nov 17, 2021 | Not reported |
| Industry KEV feed | Aug 6, 2021 | Nov 17, 2021 | Not reported |
| CIRCL KEV | Nov 3, 2021 | Nov 17, 2021 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Hyperflex Hx Data PlatformCisco | >= n/a | 4.0\(2e\) |
Patched Releases
Hyperflex Hx Data Platform
4.0\(2e\)
Timeline
Publicly disclosed
Jun 24, 2021
Added to Industry KEV feed
Aug 6, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Oct 21, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2021-1567
- advisory20210505 Cisco HyperFlex HX Command Injection Vulnerabilities
- advisoryhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwpresc-ySJGvE9
- advisoryhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwpresc-ySJGvE9?vs_f=Cisco%20Security%20Advisory&vs_cat=Security%20Intelligence&vs_type=RSS&vs_p=Cisco%20SD-WAN%20Solution%20Privilege%20Escalation%20Vulnerability&vs_k=1
- advisoryhttps://www.google.com/url?rct=j&sa=t&url=https://itbrief.co.nz/story/vulnerabilities-discovered-in-cisco-it-infrastructure-deployment-solution&ct=ga&cd=CAIyHTZhY2JhMGMyZGY3NWViZWU6Y29tLnRyOmVuOlRS&usg=AFQjCNGsQntfy4fX21vr7oyBEWHFZaon7g
FAQ
Common Questions.
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.
Affected: Hyperflex Hx Data Platform (Cisco) versions >= n/a. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 6, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of Nov 17, 2021.
Public exploit code is available.
Fixed versions are available, including Hyperflex Hx Data Platform 4.0\(2e\).
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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