CVE-2021-36287Network attack vector

Unauthenticated command execution via file service

Published Apr 8, 2022 · Updated Sep 16, 2024

Remote code execution in Dell VNX2 for file 8.1.21.266 and earlier allows remote attackers to execute commands without authentication. The Dell advisory does not identify the specific file-service endpoint, parser, or input operation that enables command execution. No credentials or user interaction are required, and successful exploitation can compromise the storage system's confidentiality, integrity, and availability.

CVSS severity9.8
Critical
EPSS probability2.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Dell VNX2 for file 8.1.21.266 and earlier allows remote attackers to execute commands without authentication. The Dell advisory does not identify the specific file-service endpoint, parser, or input operation that enables command execution. No credentials or user interaction are required, and successful exploitation can compromise the storage system's confidentiality, integrity, and availability.

The record

CVE
CVE-2021-36287
Published
Apr 8, 2022
Updated
Sep 16, 2024
Vendor
Dell
Product
VNX2
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <Version 8.1.21.303 (file) Version 5.33.021.5.303 (block)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell · VNX2version=unspecified <Version 8.1.21.303 (file) Version 5.33.021.5.303 (block)

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3Dell TechnologiesCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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