⚠ Actively exploited
Added to CISA KEV on 2025-03-13. Federal agencies required to patch by 2025-04-03. Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable..
CVE-2025-21590 — Improper Isolation or Compartmentalization in Networks Junos OS
Severity
6.7MEDIUMNVD
EPSS
0.8%
top 26.37%
CISA KEV
KEV
Added 2025-03-13
Due 2025-04-03
Exploit
No known exploits
Affected products
Timeline
PublishedMar 12
KEV addedMar 13
KEV dueApr 3
CISA Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
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:
* All versions before 21.2R3-S9,
* 21.4 versions before 21.4R3-S10,
* 22.2 versions before 22.2R3-S6,
* 22.4 ve…
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected Packages2 packages
🔴Vulnerability Details
3GHSA▶
GHSA-jwv5-xmf5-mp56: An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to↗2025-03-12