CVE-2026-57032

Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc process crash

MEDIUM

6.5

CVSS Score

Published: July 9, 2026 at 09:14 PM UTC

Updated: October 25, 2026 at 03:10 PM UTC

1 product affected across 1 vendorJunos· also runs on 9 platforms

Using Junos OS by Juniper Networks?

Get instant alerts when new vulnerabilities affect Junos OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

An Improper Handling of Undefined Parameters vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on EX Series devices allows an authenticated attacker with low privileges to cause a Denial-of-Service (DoS). If an attempt is made to subscribe to an unsupported telemetry sensor path on EX2300, EX3400, EX4000, EX4100 and EX4400 via gRPC, this causes the FPC to crash. This leads to a complete service outage until the module has automatically restarted. The following log message can be seen when this issue happens: agentd[<PID>]: AGENTD_RESOURCE_NOT_FOUND: No resource name found for <sensor> This issue affects Junos OS on EX2300, EX3400, EX4000, EX4100 and EX4400 devices: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S5, * 24.4 versions before 24.4R2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

Affected range stops below 23.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.2R2-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.4R2, so it looks safe — our inference, not a vendor statement

juniper-ex2300 (environment) · juniper-ex2300-c (environment) · juniper-ex3400 (environment) · juniper-ex4000 (environment) · juniper-ex4100 (environment) · juniper-ex4100-f (environment) · juniper-ex4100-h (environment) · juniper-ex4100-h-12t (environment) · juniper-ex4400 (environment)