Print - 【Vulnerability Alert】 Junos OS Evolved PTX Series contains a critical security vulnerability (CVE-2026-21902).

【Vulnerability Alert】 Junos OS Evolved PTX Series contains a critical security vulnerability (CVE-2026-21902).

publish date : 2026-03-05 update date : 2026-03-05

Source: Ministry of education information & communication security contingency platform

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Publication Number	TACERT-ANA-2026030209030505	Publication Time	2026/03/02 09:19
Incident Type	ANA-Vulnerability Alert	Discovery Time	2026/03/02 09:19
Impact Level	Low
[Subject] 【Vulnerability Alert】 Junos OS Evolved PTX Series contains a critical security vulnerability (CVE-2026-21902).
[Content] Forwarded from TWCERTCC-200-202602-00000013 Juniper Networks has issued a critical security advisory for its Junos OS Evolved PTX series products (CVE-2026-21902, CVSS: 9.8). This vulnerability is an improper privilege assignment issue for a critical resource, which allows an unauthenticated attacker to execute arbitrary code with root privileges. (Information Sharing Level: WHITE (Information content can be publicly disclosed)
[Affected Platform] Junos OS Evolved PTX Series versions 25.4R1-S1-EVO and 25.4R2-EVO.
[Recommended Actions] Please update to the following versions: Junos OS Evolved PTX Series 25.4R1-S1-EVO, 25.4R2-EVO, and 26.2R1-EVO (or later versions).
[Reference] https://www.twcert.org.tw/tw/cp-169-10736-63e97-1.html

(This notification is for informational purposes only and does not constitute a cybersecurity incident).
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Ministry of education information & communication security contingency platform
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