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-2026-76301 are related to protection mechanism failure and are grouped under the Common Weakness Enumeration (CWE) CWE-693.
Published: 2026-10-21
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Protection mechanism failure that may allow unauthorized access or escalation.
Action: Immediate Patch
AI Analysis

Impact

The vulnerability originates from a protection mechanism failure as categorized under CWE-693. The affected product is Splunk Enterprise, and the issue was discovered during an internal security review. The flaw involves failures in the system's ability to enforce intended security controls, potentially permitting an attacker to bypass protection mechanisms. Based on the nature of protection mechanism failures, it is inferred that an attacker could potentially bypass security controls, leading to unauthorized access or privilege escalation within the Splunk deployment.

Affected Systems

The flaw affects all instances of Splunk Enterprise running versions older than 10.4.4, 10.2.8, 10.0.11, or 9.4.16 depending on the release line, as these are the versions that include the hardening fixes. The vulnerability references the Splunk:Splunk Enterprise vendor/product but does not specify additional sub‑products. No specific version ranges are detailed beyond the upgrade guidance.

Risk and Exploitability

The EPSS score is < 1%, and the vulnerability is not listed in the CISA KEV catalog. The CVSS score of 9.8 indicates high severity, but due to the lack of publicly disclosed exploitation activity and the internal nature of the review, the risk is considered uncertain; however, because the flaw involves protection mechanisms, caution is advised, and remediation is recommended promptly.

Generated by OpenCVE AI on October 28, 2026 at 03:37 UTC.

Remediation

Vendor Solution

Upgrade Splunk Enterprise to versions 10.4.4, 10.2.8, 10.0.11, and 9.4.16 or higher.


OpenCVE Recommended Actions

  • Upgrade Splunk Enterprise to at least version 10.4.4, 10.2.8, 10.0.11, or 9.4.16, depending on your release line, to receive the protection mechanism hardening fixes.
  • After updating, verify that all role‑based access controls and authentication endpoints are correctly configured to enforce the new security controls, ensuring that no privileged access is granted inadvertently.
  • Perform a configuration audit to confirm that permissions for configuration files and system directories are set to the least privilege required, as protection mechanism failures often stem from inadequate file and directory access rights.

Generated by OpenCVE AI on October 28, 2026 at 03:37 UTC.

Tracking

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Advisories

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History

Wed, 28 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 07:45:00 +0000

Type Values Removed Values Added
First Time appeared Splunk
Splunk splunk Enterprise
Vendors & Products Splunk
Splunk splunk Enterprise

Wed, 21 Oct 2026 23:00:00 +0000

Type Values Removed Values Added
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-2026-76301 are related to protection mechanism failure and are grouped under the Common Weakness Enumeration (CWE) CWE-693.
Title Security Hardening in Splunk Enterprise - October 2026
Weaknesses CWE-693
References

Subscriptions

Splunk Splunk Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-28T02:04:50.054Z

Reserved: 2026-08-19T12:02:03.623Z

Link: CVE-2026-76301

cve-icon Vulnrichment

Updated: 2026-10-28T02:04:41.668Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T23:17:28.167

Modified: 2026-10-28T03:17:15.090

Link: CVE-2026-76301

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T03:45:13Z

Weaknesses
  • CWE-693

    Protection Mechanism Failure