Security readout for executives and security teams
Plain-English summary
CVE-2021-42082 lets a local QuantaStor user run scripts with root privileges. For a storage platform, that can mean full system takeover, data access, configuration tampering, or service disruption after an attacker already has local access.
Executive priority
Prioritize remediation for internet-facing or shared-administration storage environments, but treat all affected QuantaStor hosts seriously because successful exploitation can grant root control over storage infrastructure.
Technical view
OSNEXUS QuantaStor before 6.0.0.355 has improper privilege management, mapped to CWE-269. The CVSS 3.1 score is 7.8 because exploitation is local, low complexity, requires low privileges, needs no user interaction, and can impact confidentiality, integrity, and availability.
Likely exposure
Exposure is most relevant to organizations running OSNEXUS QuantaStor versions before 6.0.0.355, especially where multiple users, support accounts, or compromised local credentials exist on the storage host.
Exploitation context
The bundle includes public technical references and a proof-of-concept reference, but KEV is false and no supplied source confirms active exploitation in the wild.
Researcher notes
The affected-version detail in the bundle is inconsistent: the title says before 6.0.0.355, while the affected object lists version 0 with unknown default status. Validate exact product builds against OSNEXUS or advisory data before scoping broadly.
Mitigation direction
- Identify all OSNEXUS QuantaStor systems and installed versions.
- Upgrade affected QuantaStor systems to 6.0.0.355 or later if vendor guidance confirms applicability.
- Restrict local shell and management access to trusted administrators only.
- Review OSNEXUS guidance before applying compensating controls or maintenance actions.
- Monitor storage hosts for unexpected privileged script execution or account activity.
Validation and detection
- Confirm whether each QuantaStor instance is older than 6.0.0.355.
- Check for local user accounts that do not require host access.
- Review system and application logs for suspicious privileged operations.
- Verify patch status through OSNEXUS release or support documentation.
- Confirm administrative access paths are limited and logged.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-42082 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wbsec.nl/osnexusCVE reference · third-party-advisory, technical-description
- https://csirt.divd.nl/DIVD-2021-00020/CVE reference · third-party-advisory
- https://www.osnexus.com/products/software-defined-storageCVE reference · product
- https://csirt.divd.nl/CVE-2021-42082CVE reference · third-party-advisory, technical-description
- https://www.divd.nl/DIVD-2021-00020CVE reference · third-party-advisory, x_transferred
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.