How severe is CVE-2021-21578?

CVE-2021-21578 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-21578 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21578?

CVE-2021-21578 affects Dell Emc Idrac9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21578?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21578 published?

CVE-2021-21578 was published on 2021-08-03 and last updated on 2026-06-17.

CVE-2021-21578

CVE-2021-21578 is a medium-severity vulnerability in Dell Emc Idrac9 Firmware with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Dell Emc Idrac9 Firmware
Published: 2021-08-03
Last modified: 2026-06-17

Description

Dell EMC iDRAC9 versions prior to 4.40.40.00 contain an open redirect vulnerability. A remote unauthenticated attacker may exploit this vulnerability to redirect users to arbitrary web URLs by tricking the victim users to click on maliciously crafted links.

Frequently asked questions

What is CVE-2021-21578?: Dell EMC iDRAC9 versions prior to 4.40.40.00 contain an open redirect vulnerability. A remote unauthenticated attacker may exploit this vulnerability to redirect users to arbitrary web URLs by tricking the victim users to click on maliciously crafted links.
How severe is CVE-2021-21578?: CVE-2021-21578 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-21578 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21578?: CVE-2021-21578 affects Dell Emc Idrac9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21578?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21578 published?: CVE-2021-21578 was published on 2021-08-03 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/000189193

Affected products (1)

cpe:2.3:o:dell:emc_idrac9_firmware:*:*:*:*:*:*:*:*

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Other CWE-601 (Open Redirect) vulnerabilities

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CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.

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