# Junos vulnerabilities

> Junos is made by Juniper. We track 646 published vulnerabilities listed under that exact name, across 209 versions. 7 of them are on the list of flaws known to be exploited, the newest added on 13 March 2025. Juniper lists newer releases under their own names, such as Junos OS Evolved, so check those pages too.

Canonical page: https://www.precursorintelligence.com/product/juniper/junos

## At a glance

- **Made by:** [Juniper](https://www.precursorintelligence.com/vendors/juniper)
- **Published vulnerabilities:** 646
- **Known to be exploited:** 7 (listed under the name Junos)
- **Versions tracked:** 209
- **Most recently added to the known-exploited list:** [CVE-2025-21590](https://www.precursorintelligence.com/what-is/cve-2025-21590), 13 March 2025. We keep watching the list.

## Is Junos listed under other names?

Juniper also lists Junos under more specific names, such as Junos OS Evolved and Junos Space. Flaws listed only under those names are counted on their own pages, not here.

- [Junos OS Evolved](https://www.precursorintelligence.com/product/juniper/junos_os_evolved): 157 published vulnerabilities
- [Junos Space](https://www.precursorintelligence.com/product/juniper/junos_space): 50 published vulnerabilities
- [Junos Space Ja1500 Appliance](https://www.precursorintelligence.com/product/juniper/junos_space_ja1500_appliance): 6 published vulnerabilities
- [Junos Pulse Secure Access Service](https://www.precursorintelligence.com/product/juniper/junos_pulse_secure_access_service): 5 published vulnerabilities
- [Junos Space Virtual Appliance](https://www.precursorintelligence.com/product/juniper/junos_space_virtual_appliance): 4 published vulnerabilities
- [Junos Pulse Access Control Service](https://www.precursorintelligence.com/product/juniper/junos_pulse_access_control_service): 3 published vulnerabilities
- [Junos E](https://www.precursorintelligence.com/product/juniper/junos_e): 2 published vulnerabilities
- [Junos Space Ja2500 Appliance](https://www.precursorintelligence.com/product/juniper/junos_space_ja2500_appliance): 2 published vulnerabilities
- [Junos M](https://www.precursorintelligence.com/product/juniper/junos_m): 1 published vulnerability
- [Junos T](https://www.precursorintelligence.com/product/juniper/junos_t): 1 published vulnerability
- [Junos J](https://www.precursorintelligence.com/product/juniper/junos_j): 1 published vulnerability
- [Junos Pulse Client](https://www.precursorintelligence.com/product/juniper/junos_pulse_client): 1 published vulnerability

## Which versions of Junos do the exploited flaws hit?

Each exploited flaw lists the versions it affects, as published. "before 20.4" means every version up to, but not including, 20.4.

- [CVE-2025-21590](https://www.precursorintelligence.com/what-is/cve-2025-21590) (Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability): up to 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.2-r3-s6, 21.2-r3-s7, 21.2-r3-s8, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 21.4-r3-s5, 21.4-r3-s6, 21.4-r3-s7, 21.4-r3-s8, 21.4-r3-s9, 22.2, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.2-r3-s2, 22.2-r3-s3, 22.2-r3-s4, 22.2-r3-s5, 22.4, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2, 22.4-r2-s1, 22.4-r2-s2, 22.4-r3, 22.4-r3-s1, 22.4-r3-s2, 22.4-r3-s3, 22.4-r3-s4, 22.4-r3-s5, 23.2, 23.2-r1, 23.2-r1-s1, 23.2-r1-s2, 23.2-r2, 23.2-r2-s1, 23.2-r2-s2, 23.4, 23.4-r1, 23.4-r1-s1, 23.4-r1-s2, 23.4-r2, 23.4-r2-s1, 23.4-r2-s2, 23.4-r2-s3, 24.2, 24.2-r1, 24.2-r1-s1, 24.2-r2
- [CVE-2023-36844](https://www.precursorintelligence.com/what-is/cve-2023-36844) (Juniper Junos OS EX Series PHP External Variable Modification Vulnerability): before 20.4, 20.4, 20.4-r1, 20.4-r1-s1, 20.4-r2, 20.4-r2-s1, 20.4-r2-s2, 20.4-r3, 20.4-r3-s1, 20.4-r3-s2, 20.4-r3-s3, 20.4-r3-s4, 20.4-r3-s5, 20.4-r3-s6, 20.4-r3-s7, 20.4-r3-s8, 21.1-r1, 21.1-r1-s1, 21.1-r2, 21.1-r2-s1, 21.1-r2-s2, 21.1-r3, 21.1-r3-s1, 21.1-r3-s2, 21.1-r3-s3, 21.1-r3-s4, 21.1-r3-s5, 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.2-r3-s6, 21.3, 21.3-r1, 21.3-r1-s1, 21.3-r1-s2, 21.3-r2, 21.3-r2-s1, 21.3-r2-s2, 21.3-r3, 21.3-r3-s1, 21.3-r3-s2, 21.3-r3-s3, 21.3-r3-s4, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 22.1-r1, 22.1-r1-s1, 22.1-r1-s2, 22.1-r2, 22.1-r2-s1, 22.1-r2-s2, 22.1-r3, 22.1-r3-s1, 22.1-r3-s2, 22.1-r3-s3, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.3-r1, 22.3-r1-s1, 22.3-r1-s2, 22.3-r2, 22.3-r2-s1, 22.3-r3, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2, 23.2-r1
- [CVE-2023-36845](https://www.precursorintelligence.com/what-is/cve-2023-36845) (Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability): before 20.4, 20.4, 20.4-r1, 20.4-r1-s1, 20.4-r2, 20.4-r2-s1, 20.4-r2-s2, 20.4-r3, 20.4-r3-s1, 20.4-r3-s2, 20.4-r3-s3, 20.4-r3-s4, 20.4-r3-s5, 20.4-r3-s6, 20.4-r3-s7, 20.4-r3-s8, 21.1-r1, 21.1-r1-s1, 21.1-r2, 21.1-r2-s1, 21.1-r2-s2, 21.1-r3, 21.1-r3-s1, 21.1-r3-s2, 21.1-r3-s3, 21.1-r3-s4, 21.1-r3-s5, 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.2-r3-s6, 21.3, 21.3-r1, 21.3-r1-s1, 21.3-r1-s2, 21.3-r2, 21.3-r2-s1, 21.3-r2-s2, 21.3-r3, 21.3-r3-s1, 21.3-r3-s2, 21.3-r3-s3, 21.3-r3-s4, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 22.1-r1, 22.1-r1-s1, 22.1-r1-s2, 22.1-r2, 22.1-r2-s1, 22.1-r2-s2, 22.1-r3, 22.1-r3-s1, 22.1-r3-s2, 22.1-r3-s3, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.3-r1, 22.3-r1-s1, 22.3-r1-s2, 22.3-r2, 22.3-r2-s1, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2, 23.2-r1
- [CVE-2023-36847](https://www.precursorintelligence.com/what-is/cve-2023-36847) (Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability): before 20.4, 20.4, 20.4-r1, 20.4-r1-s1, 20.4-r2, 20.4-r2-s1, 20.4-r2-s2, 20.4-r3, 20.4-r3-s1, 20.4-r3-s2, 20.4-r3-s3, 20.4-r3-s4, 20.4-r3-s5, 20.4-r3-s6, 20.4-r3-s7, 21.1-r1, 21.1-r1-s1, 21.1-r2, 21.1-r2-s1, 21.1-r2-s2, 21.1-r3, 21.1-r3-s1, 21.1-r3-s2, 21.1-r3-s3, 21.1-r3-s4, 21.1-r3-s5, 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.3, 21.3-r1, 21.3-r1-s1, 21.3-r1-s2, 21.3-r2, 21.3-r2-s1, 21.3-r2-s2, 21.3-r3, 21.3-r3-s1, 21.3-r3-s2, 21.3-r3-s3, 21.3-r3-s4, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 22.1-r1, 22.1-r1-s1, 22.1-r1-s2, 22.1-r2, 22.1-r2-s1, 22.1-r2-s2, 22.1-r3, 22.1-r3-s1, 22.1-r3-s2, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.3-r1, 22.3-r1-s1, 22.3-r1-s2, 22.3-r2, 22.3-r2-s1, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2
- [CVE-2023-36851](https://www.precursorintelligence.com/what-is/cve-2023-36851) (Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability): 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.2-r3-s6, 21.2-r3-s7, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 21.4-r3-s5, 22.1-r1, 22.1-r1-s1, 22.1-r1-s2, 22.1-r2, 22.1-r2-s1, 22.1-r2-s2, 22.1-r3, 22.1-r3-s1, 22.1-r3-s2, 22.1-r3-s3, 22.1-r3-s4, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.2-r3-s2, 22.3-r1, 22.3-r1-s1, 22.3-r1-s2, 22.3-r2, 22.3-r2-s1, 22.3-r3, 22.3-r3-s1, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2, 22.4-r2-s1, 23.2-r1, 23.2-r1-s1
- [CVE-2023-36846](https://www.precursorintelligence.com/what-is/cve-2023-36846) (Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability): before 20.4, 20.4, 20.4-r1, 20.4-r1-s1, 20.4-r2, 20.4-r2-s1, 20.4-r2-s2, 20.4-r3, 20.4-r3-s1, 20.4-r3-s2, 20.4-r3-s3, 20.4-r3-s4, 20.4-r3-s5, 20.4-r3-s6, 20.4-r3-s7, 21.1-r1, 21.1-r1-s1, 21.1-r2, 21.1-r2-s1, 21.1-r2-s2, 21.1-r3, 21.1-r3-s1, 21.1-r3-s2, 21.1-r3-s3, 21.1-r3-s4, 21.1-r3-s5, 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2, 21.2-r2, 21.2-r2-s1, 21.2-r2-s2, 21.2-r3, 21.2-r3-s1, 21.2-r3-s2, 21.2-r3-s3, 21.2-r3-s4, 21.2-r3-s5, 21.3, 21.3-r1, 21.3-r1-s1, 21.3-r1-s2, 21.3-r2, 21.3-r2-s1, 21.3-r2-s2, 21.3-r3, 21.3-r3-s1, 21.3-r3-s2, 21.3-r3-s3, 21.3-r3-s4, 21.4, 21.4-r1, 21.4-r1-s1, 21.4-r1-s2, 21.4-r2, 21.4-r2-s1, 21.4-r2-s2, 21.4-r3, 21.4-r3-s1, 21.4-r3-s2, 21.4-r3-s3, 21.4-r3-s4, 22.1-r1, 22.1-r1-s1, 22.1-r1-s2, 22.1-r2, 22.1-r2-s1, 22.1-r2-s2, 22.1-r3, 22.1-r3-s1, 22.1-r3-s2, 22.2-r1, 22.2-r1-s1, 22.2-r1-s2, 22.2-r2, 22.2-r2-s1, 22.2-r2-s2, 22.2-r3, 22.2-r3-s1, 22.3-r1, 22.3-r1-s1, 22.3-r1-s2, 22.3-r2, 22.3-r2-s1, 22.4-r1, 22.4-r1-s1, 22.4-r1-s2, 22.4-r2
- [CVE-2020-1631](https://www.precursorintelligence.com/what-is/cve-2020-1631) (Juniper Junos OS Path Traversal Vulnerability): 12.3, 12.3-r1, 12.3-r10, 12.3-r10-s1, 12.3-r10-s2, 12.3-r11, 12.3-r12, 12.3-r12-s1, 12.3-r12-s3, 12.3-r12-s4, 12.3-r12-s6, 12.3-r12-s8, 12.3-r12-s11, 12.3-r12-s12, 12.3-r12-s13, 12.3-r12-s14, 12.3-r12-s15, 12.3x48, 12.3x48-d10, 12.3x48-d15, 12.3x48-d20, 12.3x48-d25, 12.3x48-d30, 12.3x48-d35, 12.3x48-d40, 12.3x48-d45, 12.3x48-d50, 12.3x48-d51, 12.3x48-d55, 12.3x48-d60, 12.3x48-d65, 12.3x48-d70, 12.3x48-d75, 12.3x48-d80, 12.3x48-d85, 12.3x48-d90, 12.3x48-d95, 12.3x48-d100, 14.1x53, 14.1x53-d10, 14.1x53-d15, 14.1x53-d16, 14.1x53-d25, 14.1x53-d26, 14.1x53-d27, 14.1x53-d30, 14.1x53-d35, 14.1x53-d40, 14.1x53-d42, 14.1x53-d43, 14.1x53-d44, 14.1x53-d45, 14.1x53-d46, 14.1x53-d47, 14.1x53-d48, 14.1x53-d49, 14.1x53-d50, 14.1x53-d51, 14.1x53-d52, 14.1x53-d53, 15.1-a1, 15.1, 15.1-f, 15.1-f1, 15.1-f2, 15.1-f2-s1, 15.1-f2-s2, 15.1-f2-s3, 15.1-f2-s4, 15.1-f3, 15.1-f4, 15.1-f5, 15.1-f5-s7, 15.1-f6, 15.1-f6-s1, 15.1-f6-s2, 15.1-f6-s3, 15.1-f6-s4, 15.1-f6-s7, 15.1-f6-s12, 15.1-f7, 15.1-r1, 15.1-r2, 15.1-r3, 15.1-r4, 15.1-r4-s7, 15.1-r4-s8, 15.1-r4-s9, 15.1-r5, 15.1-r5-s1, 15.1-r5-s5, 15.1-r5-s6, 15.1-r6, 15.1-r6-s1, 15.1-r6-s2, 15.1-r6-s6, 15.1-r7, 15.1-r7-s1, 15.1-r7-s2, 15.1-r7-s3, 15.1-r7-s4, 15.1-r7-s5, 15.1x49, 15.1x49-d10, 15.1x49-d15, 15.1x49-d20, 15.1x49-d25, 15.1x49-d30, 15.1x49-d35, 15.1x49-d40, 15.1x49-d45, 15.1x49-d50, 15.1x49-d55, 15.1x49-d60, 15.1x49-d65, 15.1x49-d70, 15.1x49-d75, 15.1x49-d80, 15.1x49-d90, 15.1x49-d100, 15.1x49-d110, 15.1x49-d120, 15.1x49-d130, 15.1x49-d140, 15.1x49-d150, 15.1x49-d160, 15.1x49-d170, 15.1x49-d180, 15.1x49-d190, 15.1x49-d200, 15.1x49-d210, 16.1, 16.1-r1, 16.1-r2, 16.1-r3, 16.1-r3-s10, 16.1-r3-s11, 16.1-r4, 16.1-r4-s2, 16.1-r4-s3, 16.1-r4-s4, 16.1-r4-s6, 16.1-r4-s12, 16.1-r5, 16.1-r5-s4, 16.1-r6-s1, 16.1-r6-s6, 16.1-r7, 16.1-r7-s2, 16.1-r7-s3, 16.1-r7-s4, 16.1-r7-s5, 16.1-r7-s6, 16.1-r7-s7, 17.2, 17.2-r1, 17.2-r1-s1, 17.2-r1-s2, 17.2-r1-s3, 17.2-r1-s4, 17.2-r1-s5, 17.2-r1-s7, 17.2-r1-s8, 17.2-r2, 17.2-r2-s6, 17.2-r2-s7, 17.2-r2-s11, 17.2-r3-s1, 17.2-r3-s2, 17.2-r3-s3, 17.3, 17.3-r1-s1, 17.3-r2, 17.3-r2-s1, 17.3-r2-s2, 17.3-r2-s3, 17.3-r2-s4, 17.3-r3, 17.3-r3-s1, 17.3-r3-s2, 17.3-r3-s3, 17.3-r3-s4, 17.3-r3-s7, 17.4, 17.4-r1, 17.4-r1-s1, 17.4-r1-s2, 17.4-r1-s4, 17.4-r1-s5, 17.4-r1-s6, 17.4-r1-s7, 17.4-r2, 17.4-r2-s1, 17.4-r2-s2, 17.4-r2-s3, 17.4-r2-s4, 17.4-r2-s5, 17.4-r2-s6, 17.4-r2-s7, 17.4-r2-s8, 17.4-r2-s9, 17.4-r2-s10, 17.4-r3, 17.4-r3-s1, 18.1, 18.1-r2, 18.1-r2-s1, 18.1-r2-s2, 18.1-r2-s4, 18.1-r3, 18.1-r3-s1, 18.1-r3-s2, 18.1-r3-s3, 18.1-r3-s4, 18.1-r3-s6, 18.1-r3-s7, 18.1-r3-s8, 18.1-r3-s9, 18.2, 18.2-r1-s3, 18.2-r1-s5, 18.2-r2-s1, 18.2-r2-s2, 18.2-r2-s3, 18.2-r2-s4, 18.2-r2-s5, 18.2-r2-s6, 18.2-r3, 18.2-r3-s1, 18.2-r3-s2, 18.2-r3-s3, 18.3, 18.3-r1, 18.3-r1-s1, 18.3-r1-s2, 18.3-r1-s3, 18.3-r1-s5, 18.3-r1-s6, 18.3-r2, 18.3-r2-s1, 18.3-r2-s2, 18.3-r2-s3, 18.3-r3, 18.3-r3-s1, 18.4, 18.4-r1, 18.4-r1-s1, 18.4-r1-s2, 18.4-r1-s3, 18.4-r1-s4, 18.4-r1-s5, 18.4-r1-s6, 18.4-r2, 18.4-r2-s1, 18.4-r2-s2, 18.4-r2-s3, 18.4-r3, 19.1, 19.1-r1, 19.1-r1-s1, 19.1-r1-s2, 19.1-r1-s3, 19.1-r1-s4, 19.2, 19.2-r1, 19.2-r1-s1, 19.2-r1-s2, 19.2-r1-s3, 19.3, 19.3-r1, 19.3-r1-s1, 19.3-r2, 19.3-r2-s1, 19.3-r2-s2, 19.4-r1, 19.4-r1-s1, 20.1-r1

## Which Junos vulnerabilities are being exploited?

7 flaws are on the government list of vulnerabilities known to be exploited, newest first:

- [CVE-2025-21590](https://www.precursorintelligence.com/what-is/cve-2025-21590): Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability. Medium, CVSS 4.4, chance of use in 30 days 1.7%, known exploited since 13 March 2025.
- [CVE-2023-36844](https://www.precursorintelligence.com/what-is/cve-2023-36844): Juniper Junos OS EX Series PHP External Variable Modification Vulnerability. Medium, CVSS 5.3, chance of use in 30 days 90%, known exploited since 13 November 2023.
- [CVE-2023-36845](https://www.precursorintelligence.com/what-is/cve-2023-36845): Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 95%, known exploited since 13 November 2023.
- [CVE-2023-36847](https://www.precursorintelligence.com/what-is/cve-2023-36847): Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability. Medium, CVSS 5.3, chance of use in 30 days 83%, known exploited since 13 November 2023.
- [CVE-2023-36851](https://www.precursorintelligence.com/what-is/cve-2023-36851): Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability. Medium, CVSS 5.3, chance of use in 30 days 1.1%, known exploited since 13 November 2023.
- [CVE-2023-36846](https://www.precursorintelligence.com/what-is/cve-2023-36846): Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability. Medium, CVSS 5.3, chance of use in 30 days 93%, known exploited since 13 November 2023.
- [CVE-2020-1631](https://www.precursorintelligence.com/what-is/cve-2020-1631): Juniper Junos OS Path Traversal Vulnerability. High, CVSS 8.8, chance of use in 30 days 4.8%, known exploited since 25 March 2022.

## Which Junos flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days):

- [CVE-2023-36845](https://www.precursorintelligence.com/what-is/cve-2023-36845): 95%, Critical (CVSS 9.8), known exploited
- [CVE-2023-36846](https://www.precursorintelligence.com/what-is/cve-2023-36846): 93%, Medium (CVSS 5.3), known exploited
- [CVE-2023-36844](https://www.precursorintelligence.com/what-is/cve-2023-36844): 90%, Medium (CVSS 5.3), known exploited
- [CVE-2019-11358](https://www.precursorintelligence.com/what-is/cve-2019-11358): 87%, Medium (CVSS 6.1)
- [CVE-2023-36847](https://www.precursorintelligence.com/what-is/cve-2023-36847): 83%, Medium (CVSS 5.3), known exploited
- [CVE-2004-0230](https://www.precursorintelligence.com/what-is/cve-2004-0230): 80%, Medium (CVSS 5.0)
- [CVE-2020-10188](https://www.precursorintelligence.com/what-is/cve-2020-10188): 74%, Critical (CVSS 9.8)
- [CVE-2016-1286](https://www.precursorintelligence.com/what-is/cve-2016-1286): 62%, High (CVSS 8.6)
- [CVE-2016-1285](https://www.precursorintelligence.com/what-is/cve-2016-1285): 59%, Medium (CVSS 6.8)
- [CVE-2014-9708](https://www.precursorintelligence.com/what-is/cve-2014-9708): 56%, Medium (CVSS 5.0)

## Questions

### How many vulnerabilities does Junos have?

We track 646 published vulnerabilities listed under the name Junos, across 209 versions. The most recent Junos flaw added to the known-exploited list is CVE-2025-21590, on 13 March 2025.

### Which Junos vulnerabilities are being exploited?

7 are on the list of flaws known to be exploited. The most recently added are CVE-2025-21590, CVE-2023-36844 and CVE-2023-36845.

### Why are newer Junos flaws missing from this page?

Juniper also lists Junos under more specific names, such as Junos OS Evolved and Junos Space. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.

### Which versions of Junos do the exploited flaws affect?

Each flaw names its own versions, usually as ranges. The newest, CVE-2025-21590, affects up to 21.2, 21.2-r1, 21.2-r1-s1, 21.2-r1-s2 and more. The versions for every exploited flaw are listed on this page.

### How do I get alerts for Junos?

Create a Precursor Intelligence account and track Junos. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.

## Running Junos?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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