9.3

CVE-2026-101158: arista networks cloudvision portal Cross-site Scripting

CVSS: 9.3v4.0CriticalAwaiting analysis
Published 06-10-2026Last modified 06-10-2026
Open JSON

Vulnerability summary

CVE-2026-101158 is a critical (CVSS 9.3) Cross-site Scripting vulnerability in arista networks cloudvision portal. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.28%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 06-10-2026
    Last modifiedVulnerability information updated.

Description

A missing input validation vulnerability in the Fileserver upload API allows an authenticated attacker with file upload privileges to execute stored cross-site scripting (XSS). Successful exploitation could enable the attacker to hijack another CloudVision user's web session, potentially granting full access to their account and administrative permissions.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202620-10-2026
EPSS score
0.28%

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
  • cloudvision portal2026.2.0 | ≥ 2026.1.0, ≤ 2026.1.2 | ≥ 2025.3.0, ≤ 2025.3.3 | ≥ 1.0.0, < 2025.3.0

1 vendor · 1 product

References

1 links