CVE-2026-102061 Juniper Networks Junos OS - Remote Code Execution

Juniper Networks Junos OS and Junos OS Evolved contain a stack-based buffer overflow caused by improper handling of crafted DHCP SZTP bootstrap messages in the phone-home daemon (phcd), letting adjacent unauthenticated attackers execute arbitrary code as root, exploit requires adjacent network access on platforms supporting Secure-ZTP.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Update to the latest version that patches the buffer overflow vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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