CVE-2025-52985
Junos OS Evolved: When a control-plane firewall filter refers to a prefix-list with more than 10 entries it's not matching
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Junos OS Evolved: When a control-plane firewall filter refers to a prefix-list with more than 10 entries it's not matching
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.
- Record
CVE-2025-52985- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-480
- Updated
- 2026-11-02
EUVDEUVD-2025-21145
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.
- Record
EUVD-2025-21145- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c7mr-h37w-h53j
A Use of Incorrect Operator vulnerability in the Routing Engine firewall of Juniper Networks...
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 not affect Junos OS Evolved versions before 23.2R1-EVO.
- Record
GHSA-c7mr-h37w-h53j- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-480
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-52985- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-480
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-52985 is a medium vulnerability (CVSS 6.9) in Juniper Junos Os Evolved, published July 11, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.