7.5

CVE-2025-6188: arista networks eos Authentication Bypass by Spoofing

CVSS: 7.5v3.1HighDeferred
Published 25-08-2025Last modified 27-08-2025
Open JSON

Vulnerability summary

CVE-2025-6188 is a high (CVSS 7.5) Authentication Bypass by Spoofing vulnerability in arista networks eos. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-08-2025
    PublishedVulnerability first disclosed.
  2. 27-08-2025
    Last modifiedVulnerability information updated.

Description

On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

0.00 pp

From 0.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Arista networks1 product
  • eos≥ 4.33.0, ≤ 4.33.1F | ≥ 4.33.1.0, ≤ 4.33.1.2F | ≥ 4.32.4.0, ≤ 4.32.4.1M | ≥ 4.31.0, ≤ 4.31.6M | ≥ 4.30.0, ≤ 4.30.9.1M

1 vendor · 1 product

References

1 links