What’s Vulnerable › Vulnerabilities

CVE-2020-15898

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-28 · updated 2026-06-17

Description

In Arista EOS malformed packets can be incorrectly forwarded across VLAN boundaries in one direction. This vulnerability is only susceptible to exploitation by unidirectional traffic (ex. UDP) and not bidirectional traffic (ex. TCP). This affects: EOS 7170 platforms version 4.21.4.1F and below releases in the 4.21.x train; EOS X-Series versions 4.21.11M and below releases in the 4.21.x train; 4.22.6M and below releases in the 4.22.x train; 4.23.4M and below releases in the 4.23.x train; 4.24.2.1F and below releases in the 4.24.x train.

Affected products

• Arista Networks EOS: from 4.21.0f through 4.21.4.1f; from 4.21.0f through 4.21.11m; from 4.22.0f through 4.22.6m; from 4.23.0f through 4.23.4m; from 4.24.0f through 4.24.2.1f

References

• https://www.arista.com/en/support/advisories-notices/security-advisories/11996-security-advisory-56
• https://www.arista.com/en/support/advisories-notices/security-advisories/11996-security-advisory-56

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