How severe is CVE-2021-21581?

CVE-2021-21581 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-21581 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21581?

CVE-2021-21581 affects Dell Emc Idrac9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21581?

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

When was CVE-2021-21581 published?

CVE-2021-21581 was published on 2021-08-03 and last updated on 2026-06-17.

CVE-2021-21581

CVE-2021-21581 is a medium-severity vulnerability in Dell Emc Idrac9 Firmware with a CVSS 3.x base score of 6.5. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Dell Emc Idrac9 Firmware
Published: 2021-08-03
Last modified: 2026-06-17

Description

Dell EMC iDRAC9 versions prior to 5.00.00.00 contain a cross-site scripting vulnerability. A remote attacker could potentially exploit this vulnerability to run malicious HTML or JavaScript in a victim’s browser by tricking a victim in to following a specially crafted link.

Frequently asked questions

What is CVE-2021-21581?: Dell EMC iDRAC9 versions prior to 5.00.00.00 contain a cross-site scripting vulnerability. A remote attacker could potentially exploit this vulnerability to run malicious HTML or JavaScript in a victim’s browser by tricking a victim in to following a specially crafted link.
How severe is CVE-2021-21581?: CVE-2021-21581 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-21581 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21581?: CVE-2021-21581 affects Dell Emc Idrac9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21581?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21581 published?: CVE-2021-21581 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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