6.1

CVE-2026-21904: juniper networks junos space Cross-site Scripting

CVSS: 6.1v3.1MediumAnalyzed
Published 09-04-2026Last modified 10-04-2026
Open JSON

Vulnerability summary

CVE-2026-21904 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in juniper networks junos space. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.6% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.21%
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. 09-04-2026
    PublishedVulnerability first disclosed.
  2. 10-04-2026
    Last modifiedVulnerability information updated.

Description

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Juniper Networks Junos Space allows an attacker to inject script tags in the list filter field that, when visited by another user, enables the attacker to execute commands with the target's permissions, including an administrator. This issue affects all versions of Junos Space before 24.1R5 Patch V3.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

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

Juniper1 product
  • junos_space1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 2.0 | 11.1 | 11.2 | 11.3 | 11.4 | 12.1 | 12.2 | 12.3 | 13.1 | 13.1:r1.8 | 13.3:r1 | 13.3:r1.1 | 13.3:r1.2 | 13.3:r1.3 | 13.3:r1.4 | 13.3:r1.5 | 13.3:r1.6 | 13.3:r1.7 | 13.3:r1.8 | 13.3:r1.9 | 13.3:r2 | 13.3:r3 | 13.3:r4 | 14.1 | 14.1:r1 | 14.1:r2 | 14.1:r3 | 15.1 | 15.1:r2 | 15.1:r3 | 15.1:r4 | 15.2 | 15.2:r2 | 16.1 | 16.1:r1 | 16.1:r2 | 16.1:r3 | 16.1r3 | 17.1 | 17.1:r1 | 17.2 | 17.2:r1.4 | 18.1 | 18.1r1 | 18.2 | 18.3 | 18.4 | 19.1 | 20.3:r1 | 21.1:r1 | 21.2:r1 | 21.3:r1 | 22.1:r1 | 22.2:r1 | 22.3:r1 | 23.1:r1 | 24.1:r1 | 24.1:r2 | 24.1:r3 | 24.1:r4 | 24.1:r5
Juniper networks1 product

2 vendors · 2 products

References

1 links