What’s Vulnerable › Vulnerabilities

CVE-2020-11622

• 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: 2020-06-10 · updated 2026-06-17

Description

A vulnerability exists in Arista’s Cloud EOS VM / vEOS 4.23.2M and below releases in the 4.23.x train, 4.22.4M and below releases in the 4.22.x train, 4.21.3M to 4.21.9M releases in the 4.21.x train, 4.21.3FX-7368.*, 4.21.4-FCRFX.*, 4.21.4.1, 4.21.7.1, 4.22.2.0.1, 4.22.2.2.1, 4.22.3.1, and 4.23.2.1 Router code in a scenario where TCP MSS options are configured.

Affected products

• Arista Cloudeos: from 4.21.3m through 4.21.9m; from 4.22.0 through 4.22.4m; from 4.23.0 through 4.23.2m; 4.21.3fx-7368, 4.21.4-fcrfx, 4.21.4.1, 4.21.7.1, 4.22.2.0.1, 4.22.2.2.1 (+2)
• Arista Veos: from 4.21.3m through 4.21.9m; from 4.22.0 through 4.22.4m; from 4.23.0 through 4.23.2m; 4.21.3fx-7368, 4.21.4-fcrfx, 4.21.4.1, 4.21.7.1, 4.22.2.0.1, 4.22.2.2.1 (+2)

References

• https://www.arista.com/en/support/advisories-notices
• https://www.arista.com/en/support/advisories-notices/security-advisories/11195-security-advisory-49
• https://www.arista.com/en/support/advisories-notices
• https://www.arista.com/en/support/advisories-notices/security-advisories/11195-security-advisory-49

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