CVE-2021-21579Network attack vector

User redirection via crafted links

Published Aug 3, 2021 · Updated Sep 16, 2024

Open redirect in Dell EMC iDRAC9 before 4.40.40.00 allows remote attackers to send users to arbitrary sites through crafted links. Dell has not disclosed the affected web-interface route, parameter, or validation error that accepts an attacker-controlled destination. No authentication is required, but a user must follow the crafted link; the resulting cross-site navigation can support phishing and expose or alter browser-accessible data.

CVSS severity6.1
Medium
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Dell EMC iDRAC9 before 4.40.40.00 allows remote attackers to send users to arbitrary sites through crafted links. Dell has not disclosed the affected web-interface route, parameter, or validation error that accepts an attacker-controlled destination. No authentication is required, but a user must follow the crafted link; the resulting cross-site navigation can support phishing and expose or alter browser-accessible data.

The record

CVE
CVE-2021-21579
Published
Aug 3, 2021
Updated
Sep 16, 2024
Vendor
Dell Technologies
Product
Integrated Dell Remote Access Controller (iDRAC)
Classifications
CWE-601, T1204.001, T1566.002
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 <4.40.40.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell Technologies · Integrated Dell Remote Access Controller (iDRAC)version=unspecified <4.40.40.00

Published CVSS scores

6.1Dell TechnologiesCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/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-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link
T1566.002Phishing: Spearphishing 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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