CVE-2026-101983 Junos OS and Junos OS Evolved: An attacker causes remote code execution when J-Web virtual-domain is configured
An unauthenticated attacker can achieve remote code execution and denial of service via a stack-based buffer overflow in J-Web when virtual-domain is configured.
- 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-2026-101983?
CVE-2026-101983 is a critical 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 httpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to cause remote code execution and denial of service via a J-Web virtual-domain configured.
Weakness: CWE-121
Which versions are affected by CVE-2026-101983?
How do I fix CVE-2026-101983?
No fix has been published for CVE-2026-101983 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-2026-101983 being exploited?
There is no known exploitation of CVE-2026-101983 in the wild and no public exploit code.
Sources
Also known as GHSA-wg6r-2r3p-3vc7.