CVE-2026-101990
Juniper Networks Junos OS
- Juniper Networks Junos OS
- Critical
- CVSS 9.3
- EPSS 0.57%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Juniper Networks Junos OS | before 23.2R2-S7.7; from 23.4, before 23.4R2-S8.13; from 24.2, before 24.2R2-S5.5; from 24.4, before 24.4R2-S5; from 25.2, before 25.2R2-S2; from 25.4, before 25.4R1-S3; from 26.2, before 26.2R1-S2 | 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 26.2R1-S2 |
| Juniper Networks Junos OS Evolved | before 23.2R2-S7.7-EVO; from 23.4, before 23.4R2-S8.11-EVO; from 24.2, before 24.2R2-S5.6-EVO; from 24.4, before 24.4R2-S5-EVO; from 25.2, before 25.2R2-S2-EVO; from 25.4, before 25.4R1-S3-EVO; from 26.2, before 26.2R1-S2-EVO; 23.4X100; from 25.2X100, before 25.2X100-D35-EVO; from 25.4X300, before 25.4X300-D40-EVO | 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 26.2R1-S2-EVO |
Advisories and fixes
- Vendor advisory supportportal.juniper.net
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.3 (v4.0, scored by juniper)
- EPSS
- 0.57% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 24, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 16, 2026.
- Weakness
- CWE-121: Stack-based Buffer Overflow
- Vendor
- Juniper Networks, Junos OS
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.