Security readout for executives and security teams
Plain-English summary
Dell VNX2 for File has a path traversal flaw that could let unauthenticated attackers read or write restricted files. The issue is high severity because it is network reachable, low complexity, and does not require user interaction or credentials.
Executive priority
Prioritize remediation for internet-reachable or broadly reachable VNX2 for File systems. The business risk is unauthorized access to restricted storage appliance files, with possible configuration or data exposure.
Technical view
CVE-2021-36288 is a CWE-22 path traversal vulnerability in Dell VNX2 for File version 8.1.21.266 and earlier. CVSS 3.1 is 8.6 with AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L, indicating high confidentiality impact and lower integrity and availability impact.
Likely exposure
Exposure is limited to organizations running Dell VNX2 for File version 8.1.21.266 or earlier, especially where affected services are reachable over a network by unauthenticated users.
Exploitation context
The provided bundle does not show CISA KEV listing or cited evidence of active exploitation. Treat exploitation status as unconfirmed, not absent, because the source set is limited.
Researcher notes
Evidence supports path traversal with unauthenticated restricted file read/write impact, but the bundle does not include fixed-version details beyond the Dell advisory reference. Avoid assuming exploit maturity or exact attack surface without reviewing Dell guidance.
Mitigation direction
- Inventory Dell VNX2 for File systems and confirm running versions.
- Review Dell DSA-2021-164 for vendor update guidance.
- Apply Dell's listed security update or support-directed remediation.
- Reduce unauthenticated network reachability to affected interfaces where feasible.
Validation and detection
- Confirm whether any VNX2 for File deployment runs version 8.1.21.266 or earlier.
- Verify the Dell DSA-2021-164 remediation state for each appliance.
- Check asset exposure from untrusted networks or broad internal segments.
- Review logs for suspicious restricted file access, without assuming compromise.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36288 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
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L3.94.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/en-us/000191155/dsa-2021-164-dell-vnx2-control-station-security-update-for-multiple-vulnerabilitiesCVE reference · x_refsource_MISC
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 Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.