5.9

CVE-2020-26569: arista eos

CVSS: 5.9v3.1MediumModified
Published 28-12-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-26569 is a medium (CVSS 5.9) vulnerability in arista eos. EPSS estimates a 0.85% chance of exploitation in the next 30 days, higher than 57.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.85%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 28-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.85%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

+0.01 pp

From 0.84% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.85%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (arista.com)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Arista1 product
  • eos≥ 4.21.0f, ≤ 4.21.12m | ≥ 4.22.0f, ≤ 4.22.7m | ≥ 4.23.0f, ≤ 4.23.5m | ≥ 4.24.0f, ≤ 4.24.2f

1 vendor · 1 product

References

1 links