6.9

CVE-2025-52985: juniper networks junos os evolved Use of Incorrect Operator

CVSS: 6.9v4.0MediumAnalyzed
Published 11-07-2025Last modified 18-07-2025
Open JSON

Vulnerability summary

CVE-2025-52985 is a medium (CVSS 6.9) Use of Incorrect Operator vulnerability in juniper networks junos os evolved. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.1% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.30%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-07-2025
    PublishedVulnerability first disclosed.
  2. 18-07-2025
    Last modifiedVulnerability information updated.

Description

A Use of Incorrect Operator vulnerability in the Routing Engine firewall of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to bypass security restrictions. When a firewall filter which is applied to the lo0 or re:mgmt interface references a prefix list with 'from prefix-list', and that prefix list contains more than 10 entries, the prefix list doesn't match and packets destined to or from the local device are not filtered. This issue affects firewall filters applied to the re:mgmt interfaces as input and output, but only affects firewall filters applied to the lo0 interface as output. This issue is applicable to IPv4 and IPv6 as a prefix list can contain IPv4 and IPv6 prefixes. This issue affects Junos OS Evolved: * 23.2R2-S3-EVO versions before 23.2R2-S4-EVO, * 23.4R2-S3-EVO versions before 23.4R2-S5-EVO, * 24.2R2-EVO versions before 24.2R2-S1-EVO, * 24.4-EVO versions before 24.4R1-S3-EVO, 24.4R2-EVO. This issue doesn't affect Junos OS Evolved versions before 23.2R1-EVO.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.05 pp

From 0.25% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.30%

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_os_evolved23.2:r2-s3 | 23.4:r2-s3 | 23.4:r2-s4 | 24.2:r2 | 24.4 | 24.4:r1 | 24.4:r1-s2 | 24.4:r2
Juniper networks1 product
  • junos os evolved≥ 23.2R2-S3-EVO, < 23.2R2-S4-EVO | ≥ 23.4R2-S3-EVO, < 23.4R2-S5-EVO | ≥ 24.2R2-EVO, < 24.2R2-S1-EVO | ≥ 24.4-EVO, < 24.4R1-S3-EVO, 24.4R2-EVO

2 vendors · 2 products

References

1 links