Stack-based Buffer Overflow in Juniper Networks Junos OS Phone-home Daemon
CVE-2026-102061

8.7HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-102061?

A stack-based buffer overflow vulnerability exists in the phone-home daemon (phcd) of Juniper Networks' Junos OS and Junos OS Evolved. This flaw enables an adjacent unauthenticated attacker to potentially execute arbitrary code with root privileges by sending a specially crafted DHCP SZTP bootstrap message. It is important to be aware that this issue impacts only those platforms that support Secure-ZTP.

Affected Version(s)

Junos OS 0 < 23.2R2-S7.7

Junos OS 23.4 < 23.4R2-S8.13

Junos OS 24.2 < 24.2R2-S5.5

References

https://supportportal.juniper.net/JSA112187
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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