How severe is CVE-2021-36321?

CVE-2021-36321 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-36321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36321?

CVE-2021-36321 primarily affects Dell X1008p Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36321?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-36321 published?

CVE-2021-36321 was published on 2021-11-20 and last updated on 2026-06-17.

CVE-2021-36321

CVE-2021-36321 is a high-severity vulnerability in Dell X1008p Firmware with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Dell X1008p Firmware
Published: 2021-11-20
Last modified: 2026-06-17

Description

Dell Networking X-Series firmware versions prior to 3.0.1.8 contain an improper input validation vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability by sending specially crafted data to trigger a denial of service.

Frequently asked questions

What is CVE-2021-36321?: Dell Networking X-Series firmware versions prior to 3.0.1.8 contain an improper input validation vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability by sending specially crafted data to trigger a denial of service.
How severe is CVE-2021-36321?: CVE-2021-36321 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-36321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36321?: CVE-2021-36321 primarily affects Dell X1008p Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-36321 published?: CVE-2021-36321 was published on 2021-11-20 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000193230/dsa-2021-191-dell-networking-x-series-security-update-for-multiple-security-vulnerabilities

Affected products (9)

cpe:2.3:o:dell:x1008p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1018p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1026p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1052p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x4012_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1008_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1018_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1026_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:x1052_firmware:*:*:*:*:*:*:*:*

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