Juniper Junos vulnerabilities

CVE-2021-0277 [HIGH] CWE-125 CVE-2021-0277: An Out-of-bounds Read vulnerability in the processing of specially crafted LLDP frames by the Layer An Out-of-bounds Read vulnerability in the processing of specially crafted LLDP frames by the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved may allow an attacker to cause a Denial of Service (DoS), or may lead to remote code execution (RCE). Continued receipt and processing of these frames, sent from the local

CVE-2018-0025 [HIGH] CWE-300 CVE-2018-0025: When an SRX Series device is configured to use HTTP/HTTPS pass-through authentication services, a cl When an SRX Series device is configured to use HTTP/HTTPS pass-through authentication services, a client sending authentication credentials in the initial HTTP/HTTPS session is at risk that these credentials may be captured during follow-on HTTP/HTTPS requests by a malicious actor through a man-in-the-middle attack or by authentic servers subverted by m

CVE-2019-0036 [CRITICAL] CWE-284 CVE-2019-0036: When configuring a stateless firewall filter in Junos OS, terms named using the format "internal-n" When configuring a stateless firewall filter in Junos OS, terms named using the format "internal-n" (e.g. "internal-1", "internal-2", etc.) are silently ignored. No warning is issued during configuration, and the config is committed without error, but the filter criteria will match all packets leading to unexpected results. Affected releases are Juni

CVE-2026-21920 [HIGH] CWE-252 CVE-2026-21920: An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an SRX Series device configured for DNS processing, receives a specifically formatted DNS request flowd will crash and restart, which causes a service interrupti

CVE-2026-21917 [HIGH] CWE-1286 CVE-2026-21917: An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module o An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC cras

CVE-2026-21918 [HIGH] CWE-415 CVE-2026-21918: A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SR A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This cau

CVE-2024-21597 [HIGH] CWE-668 CVE-2024-21597: An Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juni An Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass the intended access restrictions. In an Abstracted Fabric (AF) scenario if routing-instances (RI) are configured, specific valid traffic destined to the device

CVE-2026-21914 [HIGH] CWE-667 CVE-2026-21914: An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allow An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (Dos). If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol (GTP) Modify Bearer Request message, a lock is acquired and never released. This results

CVE-2021-0275 [HIGH] CWE-79 CVE-2021-0275: A Cross-site Scripting (XSS) vulnerability in J-Web on Juniper Networks Junos OS allows an attacker A Cross-site Scripting (XSS) vulnerability in J-Web on Juniper Networks Junos OS allows an attacker to target another user's session thereby gaining access to the users session. The other user session must be active for the attack to succeed. Once successful, the attacker has the same privileges as the user. If the user has root privileges, the attacker m

CVE-2021-0208 [HIGH] CWE-20 CVE-2021-0208: An improper input validation vulnerability in the Routing Protocol Daemon (RPD) service of Juniper N An improper input validation vulnerability in the Routing Protocol Daemon (RPD) service of Juniper Networks Junos OS allows an attacker to send a malformed RSVP packet when bidirectional LSPs are in use, which when received by an egress router crashes the RPD causing a Denial of Service (DoS) condition. Continued receipt of the packet will sustain the De

CVE-2024-21619 [HIGH] CWE-209 CVE-2024-21619: A Missing Authentication for Critical Function vulnerability combined with a Generation of Error Mes A Missing Authentication for Critical Function vulnerability combined with a Generation of Error Message Containing Sensitive Information vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an unauthenticated, network-based attacker to access sensitive system information. When a user logs in, a temporary file which

CVE-2024-30392 [HIGH] CWE-121 CVE-2024-30392: A Stack-based Buffer Overflow vulnerability in Flow Processing Daemon (flowd) of Juniper Networks Ju A Stack-based Buffer Overflow vulnerability in Flow Processing Daemon (flowd) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all Junos OS MX Series platforms with SPC3 and MS-MPC/-MIC, when URL filtering is enabled and a specific URL request is received and processed, flowd will cra

CVE-2024-47497 [HIGH] CWE-400 CVE-2024-47497: An Uncontrolled Resource Consumption vulnerability in the http daemon (httpd) of Juniper Networks Ju An Uncontrolled Resource Consumption vulnerability in the http daemon (httpd) of Juniper Networks Junos OS on SRX Series, QFX Series, MX Series and EX Series allows an unauthenticated, network-based attacker to cause Denial-of-Service (DoS). An attacker can send specific HTTPS connection requests to the device, triggering the creation of processes th

CVE-2024-39542 [HIGH] CWE-1286 CVE-2024-39542: An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engi An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MPC10/11 or LC9600, MX304, and Junos OS Evolved on ACX Series and PTX Series allows an unauthenticated, network based attacker to cause a Denial-of-Service (DoS). This issue can occur in two scen

CVE-2025-60003 [HIGH] CWE-126 CVE-2025-60003: A Buffer Over-read vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS a A Buffer Over-read vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an affected device receives a BGP update with a set of specific optional transitive attributes over an established peering session, rpd will

CVE-2026-21905 [HIGH] CWE-835 CVE-2026-21905: A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the SIP application layer A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the SIP application layer gateway (ALG) of Juniper Networks Junos OS on SRX Series and MX Series with MX-SPC3 or MS-MPC allows an unauthenticated network-based attacker sending specific SIP messages over TCP to crash the flow management process, leading to a Denial of Service (Do

CVE-2026-33778 [HIGH] CWE-1286 CVE-2026-33778: An Improper Validation of Syntactic Correctness of Input vulnerability in the IPsec library used by 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 in

CVE-2026-57023 [HIGH] CWE-1284 CVE-2026-57023: An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Junip An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS). When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM

CVE-2014-3816 [CRITICAL] CWE-264 CVE-2014-3816: Juniper Junos 11.4 before 11.4R12, 12.1 before 12.1R11, 12.1X44 before 12.1X44-D35, 12.1X45 before 1 Juniper Junos 11.4 before 11.4R12, 12.1 before 12.1R11, 12.1X44 before 12.1X44-D35, 12.1X45 before 12.1X45-D30, 12.1X46 before 12.1X46-D20, 12.1X47 before 12.1X47-D10, 12.2 before 12.2R8-S2, 12.3 before 12.3R7, 13.1 before 13.1R4-S2, 13.2 before 13.2R5, 13.3 before 13.3R2-S2, and 14.1 before 14.1R1 allows remote authenticated users to gain privilege

CVE-2019-0062 [HIGH] CWE-384 CVE-2019-0062: A session fixation vulnerability in J-Web on Junos OS may allow an attacker to use social engineerin A session fixation vulnerability in J-Web on Junos OS may allow an attacker to use social engineering techniques to fix and hijack a J-Web administrators web session and potentially gain administrative access to the device. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15 on EX Series; 12.3X48 versions prior to 12.3X48-D8