Risk Letters

Exploited vulnerability

CVE-2025-21590

TLP:CLEAR

Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability

Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.

Facts

  • Vendor: Juniper
  • Product: Junos OS
  • CVSS: 6.7
  • EPSS (probability of exploitation within 30 days): 1.7 %
  • On CISA's Known Exploited Vulnerabilities list since: 13 March 2025
  • First known exploitation: 13 March 2025
  • CISA's deadline for US federal agencies: 3 April 2025
  • Weakness: CWE-653
  • First seen by Risk Letters: 13 March 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD