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CVE Vulnerability Details :
CVE-2026-21902
PUBLISHED
More InfoOfficial Page
Assigner-juniper
Assigner Org ID-8cbe9d5a-a066-4c94-8978-4b15efeae968
View Known Exploited Vulnerability (KEV) details
Published At-25 Feb, 2026 | 16:59
Updated At-26 Feb, 2026 | 14:44
Rejected At-
▼CVE Numbering Authority (CNA)
Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root

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.

Affected Products
Vendor
Juniper Networks, Inc.Juniper Networks
Product
Junos OS Evolved
Platforms
  • PTX Series
Default Status
unaffected
Versions
Affected
  • From 25.4 before 25.4R1-S1-EVO, 25.4R2-EVO (semver)
Unaffected
  • From 0 before 25.4R1-EVO (semver)
Problem Types
TypeCWE IDDescription
CWECWE-732CWE-732 Incorrect Permission Assignment for Critical Resource
Type: CWE
CWE ID: CWE-732
Description: CWE-732 Incorrect Permission Assignment for Critical Resource
Metrics
VersionBase scoreBase severityVector
3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.09.3CRITICAL
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
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 4.0
Base score: 9.3
Base severity: 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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

The following software releases have been updated to resolve this specific issue: 25.4R1-S1-EVO, 25.4R2-EVO*, 26.2R1-EVO*, and all subsequent releases. * Future Release

Configurations

Workarounds

To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks and hosts. Please ensure such filters only permit explicitly required connections and block all others. Also this service can be disabled by 'request pfe anomalies disable'.

Exploits

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://supportportal.juniper.net/JSA107128
vendor-advisory
https://kb.juniper.net/JSA107128
vendor-advisory
Hyperlink: https://supportportal.juniper.net/JSA107128
Resource:
vendor-advisory
Hyperlink: https://kb.juniper.net/JSA107128
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Details not found