CVE-2025-21590

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2025-03-13. Federal remediation due 2025-04-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.71% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 75.4% of scored records. A rank, not a probability.

NVD base score

6.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-03-12 13:59Z1 YR AGO

Last updated

2026-02-26 19:09Z6 MO AGO

Reserved

2024-12-26

Assigning CNA

juniper

Record state

PUBLISHED

Severity

Medium (CVSS 6.7)

CNA 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

Weaknesses

• CWE-653Improper Isolation or CompartmentalizationClass

Data version

5.2

Document digest

0c7081ef7565da245b2eb67a3e3f579f9eedbd6a70b0fb684307b4e5e366f097

• supportportal.juniper.nethttps://supportportal.juniper.net/JSA93446vendor-advisory
• cloud.google.comhttps://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routersthird-party-advisory
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590government-resource