Live › vulnerability › CVE-2025-21590
Go to dashboardJuniper Junos OS, the operating system on Juniper routers and switches, has an improper isolation flaw that lets a local attacker with high privileges inject arbitrary code. CISA lists it as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Juniper Junos OS | vendor | – | – |
| juniper junos | vendor | < 21.2 | 21.2 |
| juniper junos | vendor | = 21.2 | – |
| juniper junos | vendor | = 21.4 | – |
| juniper junos | vendor | = 22.2 | – |
| juniper junos | vendor |
| = 22.4 |
| – |
| juniper junos | vendor | = 23.2 | – |
| juniper junos | vendor | = 23.4 | – |
| juniper junos | vendor | = 24.2 | – |
Unknown from the sources.
Apply mitigations per vendor instructions from Juniper; discontinue use of the product if mitigations are unavailable (per CISA required action).
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device.
A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS:
This page as .md · .json · in your agent: get_signal("CVE-2025-21590")
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