CVE-2021-42081Public exploitNetwork attack vector

Administrator command execution via unsanitized storage metadata

Published Jul 10, 2023 · Updated Sep 22, 2025

OS command injection in OSNEXUS QuantaStor before 6.0.0.355 allows remote authenticated users to execute shell commands through its API. The storageSystemModify endpoint fails to neutralize shell metacharacters in newDescription, newDnsServerList, and newNTPServerList. Administrator privileges are required, and exploitation grants command execution with the API service's permissions.

CVSS severity7.2
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in OSNEXUS QuantaStor before 6.0.0.355 allows remote authenticated users to execute shell commands through its API. The storageSystemModify endpoint fails to neutralize shell metacharacters in newDescription, newDnsServerList, and newNTPServerList. Administrator privileges are required, and exploitation grants command execution with the API service's permissions.

The record

CVE
CVE-2021-42081
Published
Jul 10, 2023
Updated
Sep 22, 2025
Vendor
OSNEXUS
Product
QuantaStor
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <6.0.0.355

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OSNEXUS · QuantaStorversion=0 <6.0.0.355

Published CVSS scores

9.1Dutch Institute for Vulnerability DisclosureCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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