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TI-2021-03263 Aliases CVE-2021-4406GHSA-2xf9-j9jw-g7f7

Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others

Priority HIGH 74CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00964 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
OSNEXUSQuantaStorup to 6.0.0.355—No fix listedCNA
  • QuantaStor VendorOSNEXUS Affected up to 6.0.0.355 Fixed in — No fix listed 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

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4406
  2. 2026-10-03 Alias added: GHSA-2xf9-j9jw-g7f7

References

Exploit 1

Advisory 1

Other 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-2021-18591 Local Privilege Escalation to root in OSNEXUS QuantaStor before 6.0.0.355 CVSS 3.1HIGH 7.8
  • 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