Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2026-21902

Severity CVSS v4.0:
CRITICAL
Type:
Unavailable / Other
Publication date:
25/02/2026
Last modified:
30/03/2026

Description

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.<br /> <br /> 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.<br /> Please note that this service is enabled by default as no specific configuration is required.<br /> <br /> This issue affects Junos OS Evolved on PTX Series:<br /> <br /> <br /> <br /> * 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.<br /> <br /> <br /> <br /> <br /> This issue does not affect Junos OS Evolved versions before 25.4R1-EVO.<br /> <br /> This issue does not affect Junos OS.

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Red CVSS v4.0 Severity and Metrics:

Base Score: 9.30 CRITICAL
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Red

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): Low
Automatable (AU): Yes
Recovery (R): User
Vulnerability Response Effort (RE): Moderate
Provider Urgency (U): Red

Base Score 4.0
9.30
Severity 4.0
CRITICAL
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos_os_evolved:25.4:r1:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10001-36mr:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10002-36qdd:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10003:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10004:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10008:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:ptx10016:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools