Juniper known exploited vulnerabilities

CISA's Known Exploited Vulnerabilities catalog lists 8 Juniper vulnerabilities: 0 added in the last 365 days, 2 rated critical (CVSS 9 or higher), and 0 with known ransomware use. The most recent was added Oct 2, 2025.

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Added to KEV	CVE	Vulnerability	CVSS	EPSS	Federal due date	Ransomware use
2025-10-02	CVE-2015-7755	Juniper ScreenOS Improper Authentication Vulnerability	9.8 (v3.1)	61.1%	2025-10-23	Unknown
2025-03-13	CVE-2025-21590	Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability	6.7 (v4.0)	1.7%	2025-04-03	Unknown
2023-11-13	CVE-2023-36844	Juniper Junos OS EX Series PHP External Variable Modification Vulnerability	5.3 (v3.1)	90.0%	2023-11-17	Unknown
2023-11-13	CVE-2023-36845	Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability	9.8 (v3.1)	95.1%	2023-11-17	Unknown
2023-11-13	CVE-2023-36846	Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability	5.3 (v3.1)	93.5%	2023-11-17	Unknown
2023-11-13	CVE-2023-36847	Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability	5.3 (v3.1)	83.5%	2023-11-17	Unknown
2023-11-13	CVE-2023-36851	Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability	5.3 (v3.1)	1.1%	2023-11-17	Unknown
2022-03-25	CVE-2020-1631	Juniper Junos OS Path Traversal Vulnerability	8.8 (v3.1)	4.9%	2022-04-15	Unknown