What’s Vulnerable › Vulnerabilities

CVE-2021-36321

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-20 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Dell X1008 Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1008P Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1018 Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1018P Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1026 Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1026P Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1052 Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X1052P Firmware: before 3.0.1.8 — fixed in 3.0.1.8
• Dell X4012 Firmware: before 3.0.1.8 — fixed in 3.0.1.8

How to fix

Upgrade to a fixed version: Dell X1008 Firmware 3.0.1.8; Dell X1008P Firmware 3.0.1.8; Dell X1018 Firmware 3.0.1.8; Dell X1018P Firmware 3.0.1.8; Dell X1026 Firmware 3.0.1.8; Dell X1026P Firmware 3.0.1.8; Dell X1052 Firmware 3.0.1.8; Dell X1052P Firmware 3.0.1.8; Dell X4012 Firmware 3.0.1.8. Check the vendor advisory for mitigations.

References

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

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