CVE-2021-1497Known exploitationNetwork attack vector

Unauthenticated root command execution via input validation

Published May 6, 2021 · Updated Oct 21, 2025

Command injection in Cisco HyperFlex HX Data Platform allows remote attackers to execute arbitrary commands through its web-based management interface. Insufficient validation of crafted request input lets attackers reach command execution as the root user on affected devices. The interface is unauthenticated and remotely reachable, so successful exploitation can compromise confidentiality, integrity, and availability; Cisco reports attempted exploitation in the wild.

CVSS severity9.8
Critical
EPSS probability99.93%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in Cisco HyperFlex HX Data Platform allows remote attackers to execute arbitrary commands through its web-based management interface. Insufficient validation of crafted request input lets attackers reach command execution as the root user on affected devices. The interface is unauthenticated and remotely reachable, so successful exploitation can compromise confidentiality, integrity, and availability; Cisco reports attempted exploitation in the wild.

The record

CVE
CVE-2021-1497
Published
May 6, 2021
Updated
Oct 21, 2025
Vendor
ClamAV
Product
Cisco HyperFlex HX Data Platform
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 1, 2021Exploitation reportedAttempted exploitation in the wild
  3. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco HyperFlex HX Data Platformversion=n/a

Published CVSS scores

9.8CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsShadowserver observations through Sep 16, 2026. Gaps indicate unavailable data.
Sep 10, 2026Sep 16, 2026
View daily counts
Reporting dayUnique IPs
Sep 10, 20265
Sep 11, 20261
Sep 12, 20261
Sep 13, 20261
Sep 14, 20262
Sep 15, 20261
Sep 16, 2026Unavailable
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo