CVE-2020-26569

MEDIUM

5.9

CVSS Score

Published: December 28, 2020 at 03:52 PM UTC

Updated: June 17, 2026 at 03:08 AM UTC

47 products affected across 1 vendorEos7050Tx3-48C87050Cx3M-32S

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Severity

MEDIUM5.9

Exploit prediction

EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Eos · Arista

95%

4.21.0f ≤ v ≤ 4.21.12m4.22.0f ≤ v ≤ 4.22.7m4.23.0f ≤ v ≤ 4.23.5m4.24.0f ≤ v ≤ 4.24.2f

arista-7010t-48 (environment) · arista-7050cx3-32s (environment) · arista-7050cx3m-32s (environment) · arista-7050qx-32s (environment) · arista-7050qx2-32s (environment) · arista-7050sx-128 (environment) · arista-7050sx-64 (environment) · arista-7050sx-72q (environment) · arista-7050sx2-128 (environment) · arista-7050sx2-72q (environment) · arista-7050sx3-48c8 (environment) · arista-7050sx3-48yc (environment) · arista-7050sx3-48yc12 (environment) · arista-7050sx3-48yc8 (environment) · arista-7050sx3-96yc8 (environment) · arista-7050tx-48 (environment) · arista-7050tx-64 (environment) · arista-7050tx-72q (environment) · arista-7050tx2-128 (environment) · arista-7050tx3-48c8 (environment) · arista-7060cx-32s (environment) · arista-7060cx2-32s (environment) · arista-7060dx4-32 (environment) · arista-7060px4-32 (environment) · arista-7060sx2-48yc6 (environment) · arista-720xp-24y6 (environment) · arista-720xp-24zy4 (environment) · arista-720xp-48y6 (environment) · arista-720xp-48zc2 (environment) · arista-720xp-96zc2 (environment) · arista-7250qx-64 (environment) · arista-7260cx (environment) · arista-7260cx3 (environment) · arista-7260cx3-64 (environment) · arista-7260qx (environment) · arista-7300x-32q (environment) · arista-7300x-64s (environment) · arista-7300x-64t (environment) · arista-7300x3-32c (environment) · arista-7300x3-48yc4 (environment) · arista-7304x3 (environment) · arista-7308x3 (environment) · arista-7320x-32c (environment) · arista-7324x (environment) · arista-7328x (environment) · arista-7368x4 (environment)

7010T-48 · Aristadevice

80%

All versions

7050Cx3-32S · Aristadevice

80%

All versions

7050Cx3M-32S · Aristadevice

80%

All versions

7050Qx-32S · Aristadevice

80%

All versions