CVE-2026-102057 Junos OS: An attacker causes DHCP service disruption during DHCP client operation
An unauthenticated adjacent attacker can cause a denial of service in Junos OS by triggering a stack-based buffer overflow in the DHCP client process.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102057?
CVE-2026-102057 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the jdhcpd process of Juniper Networks Junos OS allows an unauthenticated adjacent attacker to cause a denial of service via a DHCP client response. The issue affects DHCP client operation and can interrupt related DHCP, relay, and zero-touch-provisioning services.
Weakness: CWE-121
Which versions are affected by CVE-2026-102057?
How do I fix CVE-2026-102057?
No fix has been published for CVE-2026-102057 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-2026-102057 being exploited?
There is no known exploitation of CVE-2026-102057 in the wild and no public exploit code.
Sources
Also known as GHSA-phc9-hjmq-297r.