Juniper Junos OS Evolved vulnerabilities

CVE-2021-0264 [HIGH] CWE-703 CVE-2021-0264: A vulnerability in the processing of traffic matching a firewall filter containing a syslog action i A vulnerability in the processing of traffic matching a firewall filter containing a syslog action in Juniper Networks Junos OS on MX Series with MPC10/MPC11 cards installed, PTX10003 and PTX10008 Series devices, will cause the line card to crash and restart, creating a Denial of Service (DoS). Continued receipt and processing of packets matching the fi

CVE-2021-0226 [HIGH] CWE-665 CVE-2021-0226: On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an establi On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an established IPv6 BGP session to terminate, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue does not affect IPv4 BGP sessions. This issue affects I

CVE-2022-22211 [HIGH] CWE-770 CVE-2022-22211: A limitless resource allocation vulnerability in FPC resources of Juniper Networks Junos OS Evolved A limitless resource allocation vulnerability in FPC resources of Juniper Networks Junos OS Evolved on PTX Series allows an unprivileged attacker to cause Denial of Service (DoS). Continuously polling the SNMP jnxCosQstatTable causes the FPC to run out of GUID space, causing a Denial of Service to the FPC resources. When the FPC runs out of the GUID sp

CVE-2026-21908 [HIGH] CWE-416 CVE-2026-21908: A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Junipe A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the proc

CVE-2025-59958 [MEDIUM] CWE-754 CVE-2025-59958: An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engin An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to cause impact to confidentiality and availability. When an output firewall filter is configured with one or more terms where the action is

CVE-2021-0286 [HIGH] CWE-703 CVE-2021-0286: A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) A vulnerability in the handling of exceptional conditions in Juniper Networks Junos OS Evolved (EVO) allows an attacker to send specially crafted packets to the device, causing the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) process to crash and restart, impacting all traffic going through the FPC, resulting in a Denial of Ser

CVE-2024-39564 [HIGH] CVE-2024-39564: This is a similar, but different vulnerability than the issue reported as CVE-2024-39549. A double- This is a similar, but different vulnerability than the issue reported as CVE-2024-39549. A double-free vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This double free of memory is cau

CVE-2026-33797 [HIGH] CWE-20 CVE-2026-33797: An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS). An attacker repeatedly sending the packet will sustain the Denial of Service

CVE-2024-39553 [MEDIUM] CWE-668 CVE-2024-39553: An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Ju An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to send arbitrary data to the device, which leads msvcsd process to crash with limited availability impacting Denial of Service (DoS) and allows unauthorized network access to the device,

CVE-2026-33803 [MEDIUM] CWE-923 CVE-2026-33803: An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Netw An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device. Due to a wrong initialization, a process which should only be able to communicate internally wit

CVE-2020-1626 [HIGH] CVE-2020-1626: A vulnerability in Juniper Networks Junos OS Evolved may allow an attacker to cause a Denial of Serv A vulnerability in Juniper Networks Junos OS Evolved may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a pfemand process crash. The pfemand process is responsible for packet forwarding on the device. By continuously sending the packet flood, an attacker can repeatedly crash the pfeman

CVE-2025-59960 [HIGH] CWE-754 CVE-2025-59960: An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (j An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server. By default, the DHCP relay agent inserts its

CVE-2024-39546 [HIGH] CWE-862 CVE-2024-39546: A Missing Authorization vulnerability in the Socket Intercept (SI) command file interface of Juniper A Missing Authorization vulnerability in the Socket Intercept (SI) command file interface of Juniper Networks Junos OS Evolved allows an authenticated, low-privilege local attacker to modify certain files, allowing the attacker to cause any command to execute with root privileges leading to privilege escalation ultimately compromising the system. Thi

CVE-2022-22248 [HIGH] CWE-732 CVE-2022-22248: An Incorrect Permission Assignment vulnerability in shell processing of Juniper Networks Junos OS Ev An Incorrect Permission Assignment vulnerability in shell processing of Juniper Networks Junos OS Evolved allows a low-privileged local user to modify the contents of a configuration file which could cause another user to execute arbitrary commands within the context of the follow-on user's session. If the follow-on user is a high-privileged administr

CVE-2026-33791 [MEDIUM] CWE-78 CVE-2026-33791: An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos O 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

CVE-2026-21921 [MEDIUM] CWE-416 CVE-2026-21921: A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Jun A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker authenticated with low privileges to cause a Denial-of-Service (DoS). When telemetry collectors are frequently subscribing and unsubscribing to sensors continuously over a long period of time, telemetry-c

CVE-2026-21919 [MEDIUM] CWE-821 CVE-2026-21919: An Incorrect Synchronization vulnerability in the management daemon (mgd) of Juniper Networks Junos An Incorrect Synchronization vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker with low privileges to cause a complete Denial-of-Service (DoS) of the management plane. When NETCONF sessions are quickly established and disconnected, a locking issue causes mgd processes to ha

CVE-2023-28960 [HIGH] CWE-732 CVE-2023-28960: An Incorrect Permission Assignment for Critical Resource vulnerability in Juniper Networks Junos OS An Incorrect Permission Assignment for Critical Resource vulnerability in Juniper Networks Junos OS Evolved allows a local, authenticated low-privileged attacker to copy potentially malicious files into an existing Docker container on the local system. A follow-on administrator could then inadvertently start the Docker container leading to the maliciou

CVE-2025-30648 [HIGH] CWE-20 CVE-2025-30648: An Improper Input Validation vulnerability in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks J An Improper Input Validation vulnerability in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause the jdhcpd process to crash resulting in a Denial of Service (DoS). When a specifically malformed DHCP packet is received from a DHCP client, the jdhcpd process crashes,

CVE-2023-44184 [MEDIUM] CWE-119 CVE-2023-44184: An Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the man An Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in the management daemon (mgd) process of Juniper Networks Junos OS and Junos OS Evolved allows a network-based authenticated low-privileged attacker, by executing a specific command via NETCONF, to cause a CPU Denial of Service to the device's control plane. Th