CVE-2026-102052 Junos OS and Junos OS Evolved: An attacker causes jdhcpd to crash when the DHCPv4 local-client feature is used
An adjacent attacker can trigger a stack buffer overflow in jdhcpd to execute arbitrary code with root privileges or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102052?
CVE-2026-102052 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the jdhcpd process of Juniper Networks Junos OS and Junos OS Evolved platforms allows an adjacent unauthenticated attacker to cause denial of service or execute arbitrary code with root privileges via a malformed DHCPv4 server response when the DHCPv4 local-client feature is used.
Weakness: CWE-121
Which versions are affected by CVE-2026-102052?
How do I fix CVE-2026-102052?
No fix has been published for CVE-2026-102052 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-102052 being exploited?
There is no known exploitation of CVE-2026-102052 in the wild and no public exploit code.
Sources
Also known as GHSA-h4c2-r75j-cc53.