cvedb.io
CVE-2026-33774
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2026-04-09T22:16:25.803 · Last modified 2026-06-17T10:38:04.540

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass the configured firewall filter and access the control-plane of the device. On MX platforms with MPC10, MPC11, LC4800 or LC9600 line cards, and MX304, firewall filters applied on a loopback interface lo0.n (where n is a non-0 number) don't get executed when lo0.n is in the global VRF / default routing-instance. An affected configuration would be: user@host# show configuration interfaces lo0 | display set set interfaces lo0 unit 1 family inet filter input <filter-name> where a firewall filter is applied to a non-0 loopback interface, but that loopback interface is not referred

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.