CVE-2026-59309 vCenter authentication-bypass vulnerability
A network-based attacker can bypass authentication in VMware vCenter Directory Service to gain unauthorized system access.
- 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-2026-59309?
CVE-2026-59309 is a critical authentication bypass vulnerability in Vmware Vcenter Server, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with network access to vCenter may exploit this issue to bypass authentication and gain unauthorized access to the system.
Weakness: CWE-303
Which versions are affected by CVE-2026-59309?
It affects 1 product.
Products include Vmware Vcenter Server.
How do I fix CVE-2026-59309?
No fix has been published for CVE-2026-59309 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-59309 being exploited?
There is no known exploitation of CVE-2026-59309 in the wild and no public exploit code.
Other vulnerabilities in Vmware Vcenter Server
Sources
Also known as GHSA-fcv2-9hgc-5mgq.