CVE-2021-21581Network attack vector

Victim-browser script execution via crafted link

Published Aug 3, 2021 · Updated Sep 16, 2024

Cross-site scripting in Dell EMC iDRAC9 before 5.00.00.00 allows remote attackers to run script in a victim's browser through a crafted link. Dell has not published the affected request handler, input field, or missing neutralization operation that permits the crafted link to generate executable page content. Exploitation requires a victim to follow the link, after which attacker-supplied HTML or JavaScript executes in that browser; the vendor records integrity impact without confidentiality or availability impact.

CVSS severity6.5
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Dell EMC iDRAC9 before 5.00.00.00 allows remote attackers to run script in a victim's browser through a crafted link. Dell has not published the affected request handler, input field, or missing neutralization operation that permits the crafted link to generate executable page content. Exploitation requires a victim to follow the link, after which attacker-supplied HTML or JavaScript executes in that browser; the vendor records integrity impact without confidentiality or availability impact.

The record

CVE
CVE-2021-21581
Published
Aug 3, 2021
Updated
Sep 16, 2024
Vendor
Dell Technologies
Product
Integrated Dell Remote Access Controller (iDRAC)
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 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 <5.00.00.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell Technologies · Integrated Dell Remote Access Controller (iDRAC)version=unspecified <5.00.00.00

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.5DellCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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