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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.

PUBLISHED Reserved 2026-03-23 | Published 2026-07-09 | Updated 2026-07-10 | Assigner juniper




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

MEDIUM: 6.9CVSS: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

Problem types

CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

Product status

Default status
unaffected

Any version before 23.2R2-S7-EVO
affected

23.4 (custom) before 23.4R2-S8-EVO
affected

24.2 (custom) before 24.2R2-S5-EVO
affected

24.4 (custom) before 24.4R2-S4-EVO
affected

25.2 (custom) before 25.2R2-S1-EVO
affected

25.4 (custom) before 25.4R1-S2-EVO
affected

References

supportportal.juniper.net/JSA110078 vendor-advisory

cve.org (CVE-2026-33803)

nvd.nist.gov (CVE-2026-33803)

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