# CVE-2026-33803

## Summary

- **CVE ID:** CVE-2026-33803
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/AU:Y/R:U/RE:M)
- **CWE:** CWE-923
- **Published:** Jul 9, 2026
- **Last Modified:** Jul 10, 2026

## Description

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device.


Due to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets.

This issue affects Junos OS Evolved:


  *  all versions before 23.2R2-S7-EVO,
  *  23.4 versions before 23.4R2-S8-EVO,
  *  24.2 versions before 24.2R2-S5-EVO,
  *  24.4 versions before 24.4R2-S4-EVO,
  *  25.2 versions before 25.2R2-S1-EVO,
  *  25.4 versions before 25.4R1-S2-EVO.

## Affected Products

- Juniper Networks — Junos OS Evolved (0)
- Juniper Networks — Junos OS Evolved (23.4)
- Juniper Networks — Junos OS Evolved (24.2)
- Juniper Networks — Junos OS Evolved (24.4)
- Juniper Networks — Junos OS Evolved (25.2)
- Juniper Networks — Junos OS Evolved (25.4)

## References

- [CNA](https://supportportal.juniper.net/JSA110078)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._