Vulnerability details

CVE-2026-101936

Juniper Networks Junos OS

Junos OS: SRX Series: An attacker causes data-plane denial of service when chassis-cluster high availability is enabled

CVSS 4.0

7.1High

Official description

A Reachable Assertion vulnerability in the srxpfe process of Juniper Networks Junos OS on SRX Series allows an adjacent network attacker to cause a denial of service of the data plane via malformed firewall-authentication synchronization traffic on chassis-cluster fabric interfaces.

CVSS scores

Score	Version	Source	Vector
7.1High	4.0	CVEProject cvelistV5 (CNA) (juniper)	`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:C/RE:M`
6.5Medium	3.1	CVEProject cvelistV5 (CNA) (juniper)	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)

References and advisories

https://supportportal.juniper.net/JSA112186 vendor-advisory

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Details

Published: 2026-10-14
Last updated: 2026-10-14
State: Published
Assigner (CNA): juniper

Exploit prediction (EPSS)

0.27%

Probability of exploitation in 30 days

19.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-617
Reachable Assertion