CVE-2026-76259 Improper Privilege Management on the Management Port in Splunk Enterprise for Windows
A local user can intercept authentication tokens to escalate privileges and compromise data integrity in Splunk Enterprise for Windows.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76259?
CVE-2026-76259 is a high-severity vulnerability in Splunk Splunk, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Splunk Enterprise for Windows versions below 10.4.2, 10.2.6, 10.0.9, 9.4.13, and 9.3.14, a local user with access to the Windows host could bind to the management port before Splunk Enterprise starts, intercept authentication tokens from child processes, and use those tokens to compromise all relevant data and system integrity available to the user account running Splunk Enterprise. The vulnerability is possible because the Windows management-port listener does not apply exclusive address binding protections before the service starts.
Weakness: CWE-269
Which versions are affected by CVE-2026-76259?
It affects 1 product.
Products include Splunk Splunk.
How do I fix CVE-2026-76259?
No fix has been published for CVE-2026-76259 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76259 being exploited?
There is no known exploitation of CVE-2026-76259 in the wild and no public exploit code.
Other vulnerabilities in Splunk Splunk
- CVE-2026-20253 Splunk Enterprise Missing Authentication for Critical Function
- CVE-2026-76268 Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise
- CVE-2026-76284 Improper Neutralization in Splunk Enterprise
- CVE-2026-76285 Improper Adherence to Coding Standards in Splunk Enterprise
- CVE-2017-17067 Auth bypass in n/a
Sources
Also known as GHSA-fp6q-c27c-462m.