Vulnerability in Juniper Junos
CVE-2025-59964
A Use of Uninitialized Resource vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX4700 devices allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When forwarding-options sampling is enabled, receipt of any traffic destined to the Routing Engine (RE) by the PFE line card leads to an FPC crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of any traffic leading to the RE by the PFE line card will create a sustained Denial of Service (DoS) condition to the PFE line card. This issue affects Junos OS on SRX4700: * from 24.4 before 24.4R1-S3, 24.4R2 This issue affects IPv4 and IPv6.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Juniper Junos — versions 24.4
- Juniper Srx4700
- Juniper Networks Junos OS — versions 24.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- supportportal.juniper.net/JSA103153 (vendor-advisory, Vendor Advisory)
- www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/sta… (Technical Description, technical-description)
Frequently asked questions
- What is CVE-2025-59964?
- CVE-2025-59964 is a high-severity vulnerability in Juniper Junos, classified under Use of Uninitialized Resource. CVSS score: 7.5/10. Published 2025-10-09.
- How severe is CVE-2025-59964?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-59964 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.