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Description

An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on SRX Series allows a PITM to intercept the communication of the device and get access to confidential information and potentially modify it. When an SRX device is provisioned to connect to Security Director (SD) cloud, it doesn't perform sufficient verification of the received server certificate. This allows a PITM to intercept the communication between the SRX and SD cloud and access credentials and other sensitive information. This issue affects Junos OS: * all versions before 22.4R3-S9, * 23.2 versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2-S3, * 24.4 versions before 24.4R2-S2, * 25.2 versions before 25.2R1-S2, 25.2R2.

PUBLISHED Reserved 2026-03-23 | Published 2026-04-09 | Updated 2026-04-13 | Assigner juniper




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

HIGH: 8.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/RE:M

Problem types

CWE-296 Improper Following of a Certificate's Chain of Trust

Product status

Default status
unaffected

Any version before 22.4R3-S9
affected

23.2 (semver) before 23.2R2-S6
affected

23.4 (semver) before 23.4R2-S7
affected

24.2 (semver) before 24.2R2-S3
affected

24.4 (semver) before 24.4R2-S2
affected

25.2 (semver) before 25.2R1-S2, 25.2R2
affected

Credits

Juniper SIRT would like to acknowledge and thank Konrad Porzezynski for responsibly reporting this vulnerability. finder

References

kb.juniper.net/JSA107823 vendor-advisory

cve.org (CVE-2026-33779)

nvd.nist.gov (CVE-2026-33779)

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