CVE-2025-21590: Junos OS: An local attacker with shell access can execute arbitrary code
Juniper Networks · Junos OS
Vendor fix available · Affected: Juniper Networks Junos OS · Exploitation: in CISA KEV since 13 Mar 2025
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
ExploitationIn CISA KEV
- In CISA KEVCISA KEV catalogue13 Mar 2025
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not established: not seen
Higher than 78% of scored CVEs
DescriptionCVE.org
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 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Juniper Networks · Junos OSbefore 21.2R3-S9; from 21.4 before 21.4R3-S10; from 22.2 before 22.2R3-S6; from 22.4 before 22.4R3-S6; from 23.2 before 23.2R2-S3; from 23.4 before 23.4R2-S4 and 1 more
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue.
- CISA KEV
- Listed since 13 Mar 2025 · catalogue entry
- Public check
- No public nuclei template
- Vendor
- Juniper Networks
- Published
- March 2025
What changed
- CISA added it to the KEV catalogue CISA
CoverageNo articles yet
No CyberSIXT article names CVE-2025-21590 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.