Critical severity · published Oct 14, 2026
CVE-2026-102031
Junos OS Evolved: A low-privileged TACACS+ user causes root command execution when authorization refresh is enabled
9.8
CVSS
2.1%
EPSS
No
On KEV
Description
An OS Command Injection vulnerability in TACACS of Juniper Networks Junos OS Evolved allows a low-privileged TACACS+-authenticated user to execute commands with root privileges when periodic TACACS+ authorization-refresh is enabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JO
Junos OS Evolved · Juniper Networks
before 23.2R2-S7.7-EVO; 23.4 before 23.4R2-S8.11-EVO; 24.2 before 24.2R2-S5.6-EVO; 24.4 before 24.4R2-S5-EVO; 25.2 before 25.2R2-S2-EVO; 25.4 before 25.4R1-S3-EVO; +4 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102031
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102031
vendor-advisory
https://supportportal.juniper.net/JSA112250
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