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Juniper Junos OS β€” Security Intelligence & Vulnerability Profile


ParameterTechnical Specification
Official NameJuniper Junos OS
Vendor / Projectjuniper
Canonical IDjuniper:junos_os
Versioning Schemegeneric
CPE Identifierscpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
Overall PostureCRITICAL
Recommended Safe Release22.1.1

Documented CVEs

1 vulnerabilities cataloged in the Hermes intelligence repository.

CISA KEV Entries

1 flaws with confirmed active in-the-wild exploitation.

Weaponized Exploits

1 vulnerabilities with publicly available PoCs or weaponized exploit tooling.

Remediation Target

Recommended upgrade to 22.1.1 to neutralize known flaws.


Progression of Hermes Threat Score (HTS) posture and maximum EPSS probability over the last 30 days:

Current HTS Score

0 / 100

= Stable over 30d

Max EPSS (Exploitation)

95.1 %

= Stable over 30d

CISA KEV Activity

1

Active in-the-wild exploitation

HTS Trend Curve (D-30 β†’ Today)2026-08-12 β†’ 2026-09-10

3. Vulnerability History & Version Applicability Matrix

Section titled β€œ3. Vulnerability History & Version Applicability Matrix”
CVECVSS ScoreEPSS ProbabilityCISA KEVAffected VersionsFixed InHermes Analysis
CVE-2023-368459.8 (CRITICAL)95.1%CISA KEVv20.4.0 to v20.4.5, v21.2.0 to v21.2.4, v21.4.0 to v21.4.320.4.6, 21.2.5, 21.4.4, 22.1.1-

Vulnerabilities impacting Juniper Junos OS are actively leveraged in real-world intrusion campaigns:

  • CVE-2023-36845: Active exploitation in wild

Are you operating Juniper Junos OS in your infrastructure? Inspect your running build to evaluate applicability, confidence score, and security deltas: