CVE-2021-36294Network attack vector

Unauthenticated takeover via forged session cookie

Published Jan 25, 2022 · Updated Sep 16, 2024

Authentication bypass in Dell VNX2 OE for File 8.1.21.266 and earlier allows remote attackers to take over the VNX system. The management interface accepts a forged cookie as proof of identity, allowing access as any user account. No credentials or user interaction are required; Dell has not disclosed the specific cookie-validation error that permits the forgery.

CVSS severity9.8
Critical
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Dell VNX2 OE for File 8.1.21.266 and earlier allows remote attackers to take over the VNX system. The management interface accepts a forged cookie as proof of identity, allowing access as any user account. No credentials or user interaction are required; Dell has not disclosed the specific cookie-validation error that permits the forgery.

The record

CVE
CVE-2021-36294
Published
Jan 25, 2022
Updated
Sep 16, 2024
Vendor
Dell
Product
VNX Control Station
Classifications
CWE-330, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 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

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Is a vulnerable build present?

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  1. Affected versionversion=unspecified <TBD

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell · VNX Control Stationversion=unspecified <TBD

Published CVSS scores

9.8DellCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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