Juniper Networks vulnerabilities
We track 311 vulnerabilities in Juniper Networks products across 32 products. 306 are rated high or critical, and 9 have been exploited in real attacks. The most recent was published on October 28, 2026.
Latest Juniper Networks vulnerabilities
- 7.5 High severity
Junos OS: Missing Release of Memory after Effective Lifetime
A Missing Release of Memory after Effective Lifetime vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a Denial of Service (DoS). On all Junos platforms, the Kernel Routing Table (KRT) queue can
- 7.5 High severity
Junos OS: Use After Free
A Use After Free vulnerability in the Advanced Forwarding Toolkit (AFT) manager process (aftmand) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a kernel crash due to intensive polling of Abstracted Fabric (AF) interface sta
- 7.5 High severity
Junos OS: Buffer Copy without Checking Size of Input
A Buffer Overflow vulnerability in the PFE of Juniper Networks Junos OS on SRX series allows an unauthenticated network based attacker to cause a Denial of Service (DoS). The PFE will crash when specific traffic is scanned by Enhanced Web Filtering safe-search
- 7.5 High severity
Junos OS: Missing Release of Memory after Effective Lifetime
A Missing Release of Memory after Effective Lifetime vulnerability in the Application Quality of Experience (appqoe) subsystem of the PFE of Juniper Networks Junos OS on SRX Series allows an unauthenticated network based attacker to cause a Denial of Service (
- 7.5 High severity
Junos OS: Access of Uninitialized Pointer
An Access of Uninitialized Pointer vulnerability in the SIP ALG of Juniper Networks Junos OS allows an unauthenticated network-based attacker to cause a Denial of Service (DoS). Continued receipt of these specific packets will cause a sustained Denial of Servi
- 7.5 High severity
Junos OS: Operation on a Resource after Expiration or Release
An Operation on a Resource after Expiration or Release vulnerability in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker with an established BGP session to cause a Denial of Se
- 7.5 High severity
Junos OS Evolved: Improper Update of Reference Count
An Improper Update of Reference Count vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to trigger a counter overflow, eventually causing a Denial of Service (DoS). This issue affects Juniper Net
- 7.5 High severity
Junos OS Evolved: Improper Check for Unusual or Exceptional Conditions
An Improper Check for Unusual or Exceptional Conditions vulnerability in the packetIO daemon of Juniper Networks Junos OS Evolved on PTX10003, PTX10004, and PTX10008 allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). Continue
- 7.5 High severity
Paragon Active Assurance: Authorization Bypass Through User-Controlled Key
An Improper Access Control vulnerability in the Juniper Networks Paragon Active Assurance Control Center allows an unauthenticated attacker to leverage a crafted URL to generate PDF reports, potentially containing sensitive configuration information. A feature
- 7.8 High severity
Contrail Service Orchestration: Authentication Bypass Using an Alternate Path or Channel
An Incorrect Ownership Assignment vulnerability in Juniper Networks Contrail Service Orchestration (CSO) allows a locally authenticated user to have their permissions elevated without authentication thereby taking control of the local system they are currently
- 7.5 High severity
Junos OS: Heap-based Buffer Overflow
An Uncontrolled Memory Allocation vulnerability leading to a Heap-based Buffer Overflow in the packet forwarding engine (PFE) of Juniper Networks Junos OS allows a network-based unauthenticated attacker to flood the device with traffic leading to a Denial of S
- 7.8 High severity
Juniper Identity Management Service (JIMS): Improper Privilege Management
An Improper Privilege Management vulnerability in the Windows Installer framework used in the Juniper Networks Juniper Identity Management Service (JIMS) allows an unprivileged user to trigger a repair operation. Running a repair operation, in turn, will trigg
- 7.5 High severity
Junos OS: Improper Check for Unusual or Exceptional Conditions
A vulnerability in Juniper Networks Junos OS on SRX Series, allows a network-based unauthenticated attacker to cause a Denial of Service (DoS) by sending a specific fragmented packet to the device, resulting in a flowd process crash, which is responsible for p
- 7.5 High severity
An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows a…
An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows a network-based unauthenticated attacker who is able to connect to a specific open IPv4 port, which in affected releases should otherwise be unreachable, to cause the CPU to c
- 7.5 High severity
Junos OS: Improper Check for Unusual or Exceptional Conditions
An Improper Check for Unusual or Exceptional Conditions vulnerability in the processing of specific IPv6 packets on certain EX Series devices may lead to exhaustion of DMA memory causing a Denial of Service (DoS). Over time, exploitation of this vulnerability
- 7.5 High severity
Junos OS: Stack-based Buffer Overflow
A Stack-based Buffer Overflow vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on MX Series and SRX series allows an unauthenticated networked attacker to cause a flowd crash and thereby a Denial of Service (DoS). Continued rece
- 7.5 High severity
Junos OS: Improper Handling of Exceptional Conditions
A release of illegal memory vulnerability in the snmpd daemon of Juniper Networks Junos OS, Junos OS Evolved allows an attacker to halt the snmpd daemon causing a sustained Denial of Service (DoS) to the service until it is manually restarted. This issue impac
- 7.5 High severity
Junos OS: Improper Locking
An Improper Locking vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series and SRX Series allows an unauthenticated networked attacker to cause a flowprocessing daemon (flowd) crash and thereby a Denial of Service (DoS). Continued receipt of th
- 7.5 High severity
Junos OS: Missing Release of Memory after Effective Lifetime
A vulnerability in the processing of inbound IPv6 packets in Juniper Networks Junos OS on QFX5000 Series and EX4600 switches may cause the memory to not be freed, leading to a packet DMA memory leak, and eventual Denial of Service (DoS) condition. Once the con
- 7.5 High severity
Junos OS: Missing Release of Memory after Effective Lifetime
A Missing Release of Memory after Effective Lifetime vulnerability in the Public Key Infrastructure daemon (pkid) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause Denial of Service (DoS). In a scenario where Public Key Infrast
- 7.5 High severity
Junos OS: Improper Check for Unusual or Exceptional Conditions
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN whic
- 7.5 High severity
Junos OS: Missing Release of Resource after Effective Lifetime
A Missing Release of Resource after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated networked attacker to cause a Denial of Service (DoS) by sending specific packets over VXLAN which
- 9.8 Critical severity
Junos OS: Incorrect Authorization
A traffic classification vulnerability in Juniper Networks Junos OS on the SRX Series Services Gateways may allow an attacker to bypass Juniper Deep Packet Inspection (JDPI) rules and access unauthorized networks or resources, when 'no-syn-check' is enabled on
- 7.8 High severity
Junos OS: Generation of Error Message Containing Sensitive Information
A Generation of Error Message Containing Sensitive Information vulnerability in the CLI of Juniper Networks Junos OS allows a locally authenticated attacker with low privileges to elevate these to the level of any other user logged in via J-Web at this time, p
- 7.5 High severity
Junos OS: Uncontrolled Resource Consumption
An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band managem
- 9.3 Critical severity
Junos OS: Incorrect Authorization
A traffic classification vulnerability in Juniper Networks Junos OS on the SRX Series Services Gateways may allow an attacker to bypass Juniper Deep Packet Inspection (JDPI) rules and access unauthorized networks or resources, when 'no-syn-check' is enabled on
- 7.4 High severity
Junos OS: Improper Certificate Validation
An Improper Certificate Validation weakness in the Juniper Networks Junos OS allows an attacker to perform Person-in-the-Middle (PitM) attacks when a system script is fetched from a remote source at a specified HTTPS URL, which may compromise the integrity and
- 7.5 High severity
Junos OS: Inefficient Algorithmic Complexity
An Insufficient Algorithmic Complexity combined with an Allocation of Resources Without Limits or Throttling vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series and MX Series with SPC3 allows an unauthenticated networ
- 9.8 Critical severity
Juniper Junos OS Path Traversal Exploited
A vulnerability in the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through with Web-Redirect, and Zero Touch Provisioning (ZTP) allows an unauthenticated attacker to perform local file inclusion (LFI)
- 9.8 Critical severity
Juniper ScreenOS Improper Authentication Exploited
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b,
- 7.8 High severity
ISC BIND Data Processing Errors Exploited
named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.