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NVD
Not scored
CVE-2026-21902

Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root

Juniper NetworksJunos OS Evolved

Status
  • Not in CISA KEV
  • Vendor fix available
Exploit probabilityEPSSchecked 25 Oct
18%probability of exploitation in the next 30 days

Higher than 97% of scored CVEs

SeverityCVSS
–Not scored yet

Description NVD

An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root. The On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device. Please note that this service is enabled by default as no specific configuration is required. This issue affects Junos OS Evolved on PTX Series: 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO. This issue does not affect Junos OS Evolved versions before 25.4R1-EVO. This issue does not affect Junos OS.

Coverage 2 articles · 2 outlets

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CVE-2026-21902 coverage
Published (UTC)OutletHeadline
Fri 27 Feb · 10:51 UTCSecurityWeekJuniper fixes CVE-2026-21902 RCE in Junos OS Evolved
Fri 27 Feb · 12:54 UTCSecurity AffairsJuniper CVE-2026-21902 targets PTX routers with RCE flaw
First in our coverage: SecurityWeek, 27 FebRSS feed
  1. Juniper CVE-2026-21902 targets PTX routers with RCE flawSecurity Affairs
  2. Juniper fixes CVE-2026-21902 RCE in Junos OS EvolvedSecurityWeek · first in our coverage

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