CVE-2026-76302

Security Hardening in Splunk Enterprise - October 2026

State: Published
Severity: 9.9 Critical
Published: Oct 21, 2026
Updated: Oct 22, 2026
Reserved: Aug 19, 2026

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-2026-76302 are related to improper neutralization and are grouped under the Common Weakness Enumeration (CWE) CWE-707.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-707 The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties at met before being read from an upstream component or sent to a downstream component.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.4 to before 10.4.4Affected 10.2 to before 10.2.8Affected 10.0 to before 10.0.11Affected 9.4 to before 9.4.16Affected

References

https://advisory.splunk.com/advisories/SVD-2026-1008

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