What’s Vulnerable › Vulnerabilities

CVE-2018-5254

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-04-12 · updated 2026-06-17
• Weakness: CWE-417

Description

Arista EOS before 4.20.2F allows remote BGP peers to cause a denial of service (Rib agent restart) via a malformed path attribute in an UPDATE message.

Affected products

• Arista Networks EOS: before 4.20.2f — fixed in 4.20.2f

How to fix

Upgrade to a fixed version: Arista Networks EOS 4.20.2f. Check the vendor advisory for mitigations.

References

• https://www.arista.com/en/support/advisories-notices/security-advisories/4403-security-advisory-33
• https://www.arista.com/en/support/advisories-notices/security-advisories/4403-security-advisory-33

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