CVE-2021-21549Network attack vector

Privileged operations via forged state-changing requests

Published May 21, 2021 · Updated Sep 16, 2024

CSRF in XMS in Dell XtremIO before 6.3.3-8 allows remote attackers to trigger unintended privileged server operations. XMS accepts state-changing requests induced by an unprivileged attacker in a privileged application user's session; Dell has not disclosed the affected endpoint or missing request validation. Exploitation requires user interaction by that privileged XMS user, and the forged requests can change server state.

CVSS severity8.8
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in XMS in Dell XtremIO before 6.3.3-8 allows remote attackers to trigger unintended privileged server operations. XMS accepts state-changing requests induced by an unprivileged attacker in a privileged application user's session; Dell has not disclosed the affected endpoint or missing request validation. Exploitation requires user interaction by that privileged XMS user, and the forged requests can change server state.

The record

CVE
CVE-2021-21549
Published
May 21, 2021
Updated
Sep 16, 2024
Vendor
Dell
Product
XtremIO
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2021CVE 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?

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

  1. Affected versionversion=unspecified <XMS 6.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell · XtremIOversion=unspecified <XMS 6.3.3

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8DellCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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-352Cross-Site Request Forgery (CSRF)

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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