How severe is CVE-2021-21510?

CVE-2021-21510 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-2021-21510 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21510?

CVE-2021-21510 affects Dell Idrac8 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21510?

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

When was CVE-2021-21510 published?

CVE-2021-21510 was published on 2021-03-08 and last updated on 2026-06-17.

CVE-2021-21510

CVE-2021-21510 is a medium-severity vulnerability in Dell Idrac8 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Dell Idrac8 Firmware
Published: 2021-03-08
Last modified: 2026-06-17

Description

Dell iDRAC8 versions prior to 2.75.100.75 contain a host header injection vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability by injecting arbitrary ‘Host’ header values to poison a web-cache or trigger redirections.

Frequently asked questions

What is CVE-2021-21510?: Dell iDRAC8 versions prior to 2.75.100.75 contain a host header injection vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability by injecting arbitrary ‘Host’ header values to poison a web-cache or trigger redirections.
How severe is CVE-2021-21510?: CVE-2021-21510 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-2021-21510 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21510?: CVE-2021-21510 affects Dell Idrac8 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21510?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21510 published?: CVE-2021-21510 was published on 2021-03-08 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000183758/dsa-2021-041-dell-emc-idrac-8-security-update-for-a-host-header-injection-vulnerability

Affected products (1)

cpe:2.3:o:dell:idrac8_firmware:*:*:*:*:*:*:*:*

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