Juniper: >> Junos >> 14.1x53-d35 Security Vulnerabilities
An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system.
Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S7,
* from 24.2 before 24.2R2-S2,
* from 24.4 before 24.4R2,
* from 25.2 before 25.2R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* from 23.2 before 23.2R2-S5-EVO,
* from 23.4 before 23.4R2-S7-EVO,
* from 24.2 before 24.2R2-S2-EVO,
* from 24.4 before 24.4R2-EVO,
* from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
CVSS Score
8.4
EPSS Score
0.0
Published
2026-04-09
An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system.
When a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation.
This issue affects Junos OS:
* All versions before 22.4R3-S7,
* from 23.2 before 23.2R2-S4,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R1-S2, 24.2R2,
* from 24.4 before 24.4R1-S2, 24.4R2;
Junos OS Evolved:
* All versions before 22.4R3-S7-EVO,
* from 23.2 before 23.2R2-S4-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-EVO,
* from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.
CVSS Score
8.5
EPSS Score
0.0
Published
2026-04-09
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart. Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.
During NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.
This issue cannot be triggered using IPv4 nor other IPv6 traffic.
This issue affects Junos OS on SRX Series:
* all versions before 21.2R3-S10,
* all versions of 21.3,
* from 21.4 before 21.4R3-S12,
* all versions of 22.1,
* from 22.2 before 22.2R3-S8,
* all versions of 22.4,
* from 22.4 before 22.4R3-S9,
* from 23.2 before 23.2R2-S6,
* from 23.4 before 23.4R2-S7,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S3,
* from 25.2 before 25.2R1-S2, 25.2R2.
CVSS Score
8.7
EPSS Score
0.001
Published
2026-04-09
A Missing Release of Memory after Effective Lifetime vulnerability in the DHCP daemon (jdhcpd) of Juniper Networks Junos OS on MX Series, allows an adjacent, unauthenticated attacker to cause a memory leak, that will eventually cause a complete Denial-of-Service (DoS).
In a DHCPv6 over PPPoE, or DHCPv6 over VLAN with Active lease query or Bulk lease query scenario, every subscriber logout will leak a small amount of memory. When all available memory has been exhausted, jdhcpd will crash and restart which causes a complete service impact until the process has recovered.
The memory usage of jdhcpd can be monitored with:
user@host> show system processes extensive | match jdhcpd
This issue affects Junos OS:
* all versions before 22.4R3-S1,
* 23.2 versions before 23.2R2,
* 23.4 versions before 23.4R2.
CVSS Score
8.7
EPSS Score
0.0
Published
2026-04-09
A Missing Release of Memory after Effective Lifetime vulnerability in the BroadBand Edge subscriber management daemon (bbe-smgd) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).
If the authentication packet-type option is configured and a received packet does not match that packet type, the memory leak occurs. When all memory
available to bbe-smgd has been consumed, no new subscribers will be able to login.
The memory utilization of bbe-smgd can be monitored with the following show command:
user@host> show system processes extensive | match bbe-smgd
The below log message can be observed when this limit has been reached:
bbesmgd[<PID>]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion
This issue affects Junos OS on MX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2,
* 25.2 versions before 25.2R2.
CVSS Score
7.1
EPSS Score
0.0
Published
2026-04-09
A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS and Junos OS Evolved allows a local user with low privileges to read sensitive information.
A local user with low privileges can execute the CLI command 'show mgd' with specific arguments which will expose sensitive information.
This issue affects
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S6,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S4,
* 24.4 versions before 24.4R2-S1,
* 25.2 version before 25.2R1-S2, 25.2R2;
Junos OS Evolved:
* all versions before 23.2R2-S6-EVO,
* 23.4 version before 23.4R2-S6-EVO,
* 24.2 version before 24.2R2-S4-EVO,
* 24.4 versions before 24.4R2-S1-EVO,
* 25.2 versions before 25.2R2-EVO.
CVSS Score
6.8
EPSS Score
0.0
Published
2026-04-09
An Improper Validation of Syntactic Correctness of Input vulnerability in the IPsec library used by kmd and iked of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).
If an affected device receives a specifically malformed first ISAKMP packet from the initiator, the kmd/iked process will crash and restart, which momentarily prevents new security associations (SAs) for from being established. Repeated exploitation of this vulnerability causes a complete inability to establish new VPN connections.
This issue affects Junos OS on
SRX Series and MX Series:
* all versions before 22.4R3-S9,
* 23.2 version before 23.2R2-S6,
* 23.4 version before 23.4R2-S7,
* 24.2 versions before 24.2R2-S4,
* 24.4 versions before 24.4R2-S3,
* 25.2 versions before 25.2R1-S2, 25.2R2.
CVSS Score
8.7
EPSS Score
0.001
Published
2026-04-09
An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on SRX Series allows a PITM to intercept the communication of the device and get access to confidential information and potentially modify it.
When an SRX device is provisioned to connect to Security Director (SD) cloud, it doesn't perform sufficient verification of the received server certificate. This allows a PITM to intercept the communication between the SRX and SD cloud and access credentials and other sensitive information.
This issue affects Junos OS:
* all versions before 22.4R3-S9,
* 23.2 versions before 23.2R2-S6,
* 23.4 versions before 23.4R2-S7,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R1-S2, 25.2R2.
CVSS Score
8.3
EPSS Score
0.0
Published
2026-04-09
A Missing Release of Memory after Effective Lifetime vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a memory leak ultimately leading to a Denial of Service (DoS).
In an EVPN-MPLS scenario, routes learned from remote multi-homed Provider Edge (PE) devices are programmed as ESI routes. Due to a logic issue in the l2ald memory management, memory allocated for these routes is not released when there is churn for these routes. As a result, memory leaks in the l2ald process which will ultimately lead to a crash and restart of l2ald.
Use the following command to monitor the memory consumption by l2ald:
user@device> show system process extensive | match "PID|l2ald"
This issue affects:
Junos OS:
* all versions before 22.4R3-S5,
* 23.2 versions before 23.2R2-S3,
* 23.4 versions before 23.4R2-S4,
* 24.2 versions before 24.2R2;
Junos OS Evolved:
* all versions before 22.4R3-S5-EVO,
* 23.2 versions before 23.2R2-S3-EVO,
* 23.4 versions before 23.4R2-S4-EVO,
* 24.2 versions before 24.2R2-EVO.
CVSS Score
7.1
EPSS Score
0.0
Published
2026-04-09
A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system.
When after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root.
This issue affects Junos OS:
* all versions before 23.2R2-S7,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R2.
This issue does not affect versions 25.4R1 or later.
CVSS Score
7.0
EPSS Score
0.0
Published
2026-04-09
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