CVE-2025-21590

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.017 · 78 %ileDEEURUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV
Likely / severe?
1.74% (78th) EPSS
CVSS 5.6 · medium
Is it mine?
34 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2025-03-13remediate 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.

EPSS · scored 2026-10-26

Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.6mediumAV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:Lsecondary · FSTEC (BDU) RU
v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · sirt@juniper.net USexploitability 0.8 · impact 3.6
v4.06.7mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.06.7mediumCVSS: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:Xsecondary · sirt@juniper.net US
v4.06.7mediumCVSS: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:A/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:Xsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-653USCWE-653US
04

ATT&CK techniques

ATT&CK techniques this enables or maps to.

05

affected products (34)

Products and version ranges known to be affected.

showing 20 of 34
06

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2025-0552Juniper JUNOS: Schwachstelle ermöglicht CodeausführungDeutsch2025-03-12csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in Juniper JUNOS ausnutzen, um beliebigen Programmcode auszuführen.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundNVDCVE.orgMITRE
published 2025-03-12modified 2026-10-01
09

references (9)

External citations — patches, advisories, analysis.

scry

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