Description
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: * 24.4 releases before 24.4R2, * 25.2 releases before 25.2R1-S1, 25.2R2. This issue does not affect Junos OS releases before 24.4R1.
INFO
Published Date :
2026-04-09T21:35:48.123Z
Last Modified :
2026-04-10T14:10:08.812Z
Source :
juniper
AFFECTED PRODUCTS
The following products are affected by CVE-2026-33781 vulnerability.
| Vendors | Products |
|---|---|
| Juniper Networks |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33781.
| URL | Resource |
|---|---|
| https://kb.juniper.net/JSA107869 |
|