CVE-2020-17355

Name: CVE-2020-17355
Creator: NVD / NIST
Published: 2020-10-21T22:15:11.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.19%

Last modified Jun 17, 2026

CVE-2020-17355 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Arista EOS before 4.21.12M, 4.22.x before 4.22.7M, 4.23.x before 4.23.5M, and 4.24.x before 4.24.2F allows remote attackers to cause a denial of service (restart of agents) by crafting a malformed DHCP packet which leads to an incorrect route being installed.. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

Description

Arista EOS before 4.21.12M, 4.22.x before 4.22.7M, 4.23.x before 4.23.5M, and 4.24.x before 4.24.2F allows remote attackers to cause a denial of service (restart of agents) by crafting a malformed DHCP packet which leads to an incorrect route being installed.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.19%

64.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Arista	Eos	>= 4.21.0, < 4.21.12m
Arista	Eos	>= 4.22, < 4.22.7m
Arista	Eos	>= 4.23, < 4.23.5m
Arista	Eos	>= 4.24.0, < 4.24.2f

References

Timeline

Published: Oct 21, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-17355?

How severe is CVE-2020-17355?

CVE-2020-17355 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2020-17355?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-17355?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST