Vulnerability details
CVE-2026-33798
Juniper Networks Junos OSJuniper Networks Junos OS Evolved
Junos OS and Junos OS Evolved: SRX Series: An attacker causes remote code execution when SRX chassis-cluster is enabled
CVSS 4.0
8.7High
Official description
A Stack-based Buffer Overflow vulnerability in the srxpfe of Juniper Networks Junos OS and Junos OS Evolved on the SRX Series allows an L2-adjacent attacker to execute arbitrary code as root via high-availability fabric traffic.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (juniper) | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M |
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (juniper) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Juniper Networks | Junos OS | v < 23.2R2-S7.7 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 23.4 ≤ v < 23.4R2-S8.13 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 24.2 ≤ v < 24.2R2-S5.5 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 24.4 ≤ v < 24.4R2-S5 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 25.2 ≤ v < 25.2R2-S2 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 25.4 ≤ v < 25.4R1-S3 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS | 26.2 ≤ v < 26.2R1-S2 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | v < 23.2R2-S7.7-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 23.4X100 | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 23.4 ≤ v < 23.4R2-S8.11-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 24.2 ≤ v < 24.2R2-S5.6-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 24.4 ≤ v < 24.4R2-S5-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 25.2 ≤ v < 25.2R2-S2-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 25.2X100 ≤ v < 25.2X100-D35-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 25.4 ≤ v < 25.4R1-S3-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 25.4X300 ≤ v < 25.4X300-D40-EVO | CVEProject cvelistV5 (CNA) |
| Juniper Networks | Junos OS Evolved | 26.2 ≤ v < 26.2R1-S2-EVO | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://supportportal.juniper.net/JSA112186 vendor-advisory
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Details
- Published
- 2026-10-14
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- juniper
Exploit prediction (EPSS)
0.35%
Probability of exploitation in 30 days
28.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-121Stack-based Buffer Overflow