CVE-2025-59975Network attack vector

Management access interruption via file-handle exhaustion

Published Oct 9, 2025 · Updated Oct 9, 2025

Resource exhaustion in Junos Space before 22.2R1 Patch V3 and 23.1 before 23.1R1 Patch V3 allows remote attackers to interrupt management access. The HTTP daemon accepts sustained unauthenticated inbound API connection requests until every file handle is consumed, blocking SSH and WebUI access. Network reachability to the management interfaces is sufficient, and functionality remains unavailable until a manual reboot.

CVSS severity8.7
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Junos Space before 22.2R1 Patch V3 and 23.1 before 23.1R1 Patch V3 allows remote attackers to interrupt management access. The HTTP daemon accepts sustained unauthenticated inbound API connection requests until every file handle is consumed, blocking SSH and WebUI access. Network reachability to the management interfaces is sufficient, and functionality remains unavailable until a manual reboot.

The record

CVE
CVE-2025-59975
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Juniper Networks
Product
Junos Space
Classifications
CWE-400, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <22.2R1 Patch V3
  2. Affected versionversion=23.1 <23.1R1 Patch V3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos Spaceversion=0 <22.2R1 Patch V3; version=23.1 <23.1R1 Patch V3

Published CVSS scores

8.7Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
7.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.002Endpoint Denial of Service: Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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