CVE-2020-26569 - CVE House
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Status published Medium CVE-2020-26569

In EVPN VxLAN setups in Arista EOS, specific malformed packets...

Vulnerability Description

In EVPN VxLAN setups in Arista EOS, specific malformed packets can lead to incorrect MAC to IP bindings and as a result packets can be incorrectly forwarded across VLAN boundaries. This can result in traffic being discarded on the receiving VLAN. This affects versions: 4.21.12M and below releases in the 4.21.x train; 4.22.7M and below releases in the 4.22.x train; 4.23.5M and below releases in the 4.23.x train; 4.24.2F and below releases in the 4.24.x train.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Critical 9.8
CVE-2020-24360
An issue with ARP packets in Arista’s EOS affecting the...
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CVE-2020-24333
A vulnerability in Arista’s CloudVision Portal (CVP) prior to 2020.2...
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CVE-2020-17355
Arista EOS before 4.21.12M, 4.22.x before 4.22.7M, 4.23.x before 4.23.5M,...
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CVE-2020-15898
In Arista EOS malformed packets can be incorrectly forwarded across...
Medium 5.3

Affected Vendor

Affected Software

eos
Vulnerable Versions:
4.21.0f, 4.22.0f, 4.23.0f, 4.24.0f

Timeline

Official Publish: December 28th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.