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CVE-2026-33781 is a medium severity vulnerability with a CVSS score of 6.5. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on specific EX and QFX Series devices allow an unauthenticated, adjacent attacker to cause a complete Denial of Service (DoS).
On EX4k, and QFX5k platforms configured as service-provider edge devices, if L2PT is enabled on the UNI and VSTP is enabled on NNI in VXLAN scenarios, receiving VSTP BPDUs on UNI leads to packet buffer allocation failures, resulting in the device to not pass traffic anymore until it is manually recovered with a restart.This issue affects Junos OS:
This issue does not affect Junos OS releases before 24.4R1.
| Vendor | Product |
|---|---|
| Juniper | Junos |
| Juniper | Ex4600 |
| Juniper | Qfx5210 |
| Juniper | Ex4000 |
| Juniper | Ex4100 F |
| Juniper | Qfx5200 |
| Juniper | Ex4650 |
| Juniper | Qfx5700 |
| Juniper | Ex4100 H |
| Juniper | Qfx5240 |
And 9 more...
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