CVE-2026-76259

Received Received - Intake

Splunk Enterprise Windows Management Port Token Interception

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Cisco Systems, Inc.

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-76259

EUVD

EUVD-2026-63111

Affected Vendors & Products

Vendor	Product	Version / Range
splunk	splunk_enterprise	to 9.3.14 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This vulnerability affects Splunk Enterprise for Windows versions below 10.4.2, 10.2.6, 10.0.9, 9.4.13, and 9.3.14. A local Windows user can bind to the management port before Splunk starts, intercept authentication tokens from child processes, and use those tokens to compromise data and system integrity for the Splunk user account.

Detection Guidance

Check if Splunk Enterprise for Windows is running versions below 10.4.2, 10.2.6, 10.0.9, 9.4.13, or 9.3.14. Inspect network connections on the management port before Splunk starts to detect unauthorized bindings.

Impact Analysis

An attacker with local access could gain unauthorized control over Splunk Enterprise, access sensitive data, and alter system configurations. This could lead to data breaches, unauthorized modifications, or service disruption for the Splunk environment.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for GDPR, HIPAA, and other regulations. It may result in legal penalties, loss of certification, or reputational damage due to compromised data integrity and confidentiality.

Mitigation Strategies

Upgrade Splunk Enterprise for Windows to a patched version (10.4.2 or later, 10.2.6 or later, 10.0.9 or later, 9.4.13 or later, 9.3.14 or later). Ensure the management port listener applies exclusive address binding protections before service startup.

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