Vulnerability · Published Oct 21, 2026 · Assigned by cisco
CVE-2026-76300Security Hardening in Splunk Enterprise - October 2026
High 8.8
In plain English
A high-severity security flaw in Splunk Enterprise from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, Cisco has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76300 are related to improper control of a resource through its lifetime and are grouped under the Common Weakness Enumeration (CWE) CWE-664.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.4 – before 10.4.410.2 – before 10.2.810.0 – before 10.0.119.4 – before 9.4.16 |
Weakness: CWE-664 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H