Junos OS Evolved: PTX Series: When a firewall filter rejects traffic these packets are erroneously sent to the RE
CVE-2025-59958
Key Information:
- Vendor
Juniper Networks
- Status
- Vendor
- CVE Published:
- 9 October 2025
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What is CVE-2025-59958?
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to cause impact to confidentiality and availability.
When an output firewall filter is configured with one or moreĀ terms where the action is 'reject', packets matching these terms areĀ erroneously sent to the Routing Engine (RE) and further processed there.Ā Processing of these packets will consume limited RE resources. Also responses from the RE back to the source of this traffic could reveal confidential information about the affected device. This issue only applies to firewall filters applied to WAN or revenue interfaces, so not the mgmt or lo0 interface of the routing-engine, nor any input filters.
This issue affects Junos OS Evolved on PTX Series:
- all versions before 22.4R3-EVO,
- 23.2 versions before 23.2R2-EVO.
Affected Version(s)
Junos OS Evolved PTX Series 0 < 22.4R3-EVO
Junos OS Evolved PTX Series 23.2 < 23.2R2-EVO