PatchTheCVECVE-2026-33803: An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos
CVE-2026-33803 is a medium-severity flaw (CVSS 6.5) affecting junos os evolved. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 inadv
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 71%) |
| CISA exploited list | No |
| Weakness | CWE-923 |
| Published | 2026-07-09 |
| Last modified | 2026-10-25 |
Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-33803?
junos os evolved: upgrade to 23.2. Exact commands for each OS are on this page.
Is CVE-2026-33803 being exploited?
CVE-2026-33803 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-33803 affect?
CVE-2026-33803 affects junos os evolved. Severity is medium (CVSS 6.5). 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
How urgent is CVE-2026-33803?
Priority 35/100. Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2026-33794 MEDIUM 5.9 MITIGATE An Improper Check for Unusual or Exceptional Conditions vulnerability in the advanced forwarding toolkit (ev
- CVE-2026-57028 HIGH 7.3 UPGRADE An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos
- CVE-2026-57029 MEDIUM 5.3 MITIGATE A Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on