CVE-2026-33788
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
Missing authentication for a critical function in FPCs of Junos OS Evolved on PTX series allows a local authenticated attacker with low privileges to gain direct access to FPCs as a high-privileged user, potentially leading to full compromise.
Risk Assessment
A local low-privileged user could take over critical network components, potentially compromising the entire infrastructure.
Recommendation
Upgrade Junos OS Evolved to versions 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-EVO or later.
Other vulnerabilities in Junos OS Evolved
See all- CVE-2026-101978High
An OS command injection vulnerability in the bootzd zero-touch provisioning daemon of Junos OS Evolved on PTX Series allows an unauthenticated attacker on the management LAN to execute commands as root via a crafted gRPC response.
- CVE-2026-101967High
An OS command injection vulnerability in the bootzd zero-touch provisioning daemon of Junos OS Evolved allows an unauthenticated attacker on the management LAN to execute commands as root via a crafted DHCP response.
- CVE-2026-102085Medium
An improper restriction of communication channel to intended endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause limited information disclosure and availability impact to the device. Due to wrong initialization, a process that should only communicate internally can be reached over the network via an open port, leading to inadvertent exposure and increased CPU cycles spent processing ingress packets.
- CVE-2026-102068High
A stack-based buffer overflow vulnerability in the kernel of Juniper Networks Junos OS Evolved allows an unauthenticated remote attacker to trigger a kernel panic via a crafted TCP packet when key-chain authentication is used for BGP or LDP.
- CVE-2026-102045Medium
An Out-of-bounds Write vulnerability in lacpd of Juniper Networks Junos OS Evolved allows a Layer-2-adjacent attacker to cause a denial of service via a crafted frame received on an LACP-enabled aggregated-Ethernet member port.
- CVE-2026-102023High
A Reachable Assertion vulnerability in fwstatsd of Juniper Networks Junos OS Evolved allows an authenticated network attacker to cause a denial of service via an SNMP firewall-counter MIB query when at least one firewall counter is configured.
- CVE-2026-102012High
A Reachable Assertion vulnerability in the na-grpcd process of Juniper Networks Junos OS Evolved allows a remote unauthenticated attacker to cause a denial of service via a gRPC telemetry subscription request.
- CVE-2026-101985Medium
An Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated IS-IS peer to cause a denial of service.
- CVE-2026-101966High
A use of externally-controlled format string vulnerability in the jti-dialoutd of Junos OS Evolved allows an authenticated network attacker to cause persistent telemetry dial-out denial of service via a crafted analytics sensor resource submitted through gNMI listener.
- CVE-2026-101965High
A use of externally-controlled format string vulnerability in the gRPC daemon of Junos OS Evolved allows an authenticated network attacker to cause telemetry-service disruption, information disclosure, or potential root-level code execution via a crafted message to the gNMI service.
Original NVD description (English source)
A Missing Authentication for Critical Function vulnerability in the Flexible PIC Concentrators (FPCs) of Juniper Networks Junos OS Evolved on PTX Series allows a local, authenticated attacker with low privileges to gain direct access to FPCs installed in the device. A local user with low privileges can gain direct access to the installed FPCs as a high privileged user, which can potentially lead to a full compromise of the affected component. This issue affects Junos OS Evolved on PTX10004, PTX10008, PTX100016, with JNP10K-LC1201 or JNP10K-LC1202: * All versions before 21.2R3-S8-EVO, * 21.4-EVO versions before 21.4R3-S7-EVO, * 22.2-EVO versions before 22.2R3-S4-EVO, * 22.3-EVO versions before 22.3R3-S3-EVO, * 22.4-EVO versions before 22.4R3-S2-EVO, * 23.2-EVO versions before 23.2R2-EVO.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

