CVE-2021-21541Network attack vector

Browser-context script execution via DOM injection

Published Apr 30, 2021 · Updated Sep 16, 2024

DOM-based cross-site scripting in Dell Technologies iDRAC9 before 4.40.00.00 allows remote attackers to execute browser-context script. The management web interface places attacker-supplied HTML or JavaScript into the browser DOM without adequate neutralization; Dell has not identified the affected page, parameter, or DOM sink. Exploitation is unauthenticated but requires a victim application user to submit the crafted content, after which the browser runs it with the vulnerable web application's privileges.

CVSS severity6.1
Medium
EPSS probability0.81%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

DOM-based cross-site scripting in Dell Technologies iDRAC9 before 4.40.00.00 allows remote attackers to execute browser-context script. The management web interface places attacker-supplied HTML or JavaScript into the browser DOM without adequate neutralization; Dell has not identified the affected page, parameter, or DOM sink. Exploitation is unauthenticated but requires a victim application user to submit the crafted content, after which the browser runs it with the vulnerable web application's privileges.

The record

CVE
CVE-2021-21541
Published
Apr 30, 2021
Updated
Sep 16, 2024
Vendor
Dell Technologies
Product
Integrated Dell Remote Access Controller (iDRAC)
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 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

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 <4.40.00.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell Technologies · Integrated Dell Remote Access Controller (iDRAC)version=unspecified <4.40.00.00

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1Dell TechnologiesCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/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')
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo