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.
Published: 2026-10-21
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Improper Resource Control
Action: Immediate Patch
AI Analysis

Impact

The vulnerability arises from improper control of a resource throughout its lifetime, categorized as CWE‑664. Splunk Enterprise components may allocate or free resources such as memory, file handles, or network sockets without sufficient safeguards, enabling an attacker or erroneous process to influence their usage. The vendor’s description does not outline specific outcomes beyond the lack of control, and no exploitation evidence beyond the release of a hardening update is provided.

Affected Systems

All releases of Splunk Enterprise older than 10.4.4, 10.2.8, 10.0.11, and 9.4.16 are affected. The vendor recommends upgrading to any of these listed versions or a later release to address the flaw.

Risk and Exploitability

The CVSS score of 8.8 indicates a high severity vulnerability, yet the EPSS score of less than 1% suggests a low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog, and no public exploits have been reported. Attack vectors are not explicitly disclosed; it is inferred that exploitation would require the attacker to influence the allocation or deallocation of resources via any interface that permits such control.

Generated by OpenCVE AI on October 26, 2026 at 18:06 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 version 10.4.4, 10.2.8, 10.0.11, 9.4.16 or any newer release as recommended by the vendor.
  • If an immediate upgrade is not feasible, isolate exposed instances from external networks and monitor for abnormal resource usage.
  • Apply secure coding practices for resource management, ensuring allocation success is verified, limits are enforced, and all allocated resources are properly freed.

Generated by OpenCVE AI on October 26, 2026 at 18:06 UTC.

Tracking

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Advisories

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History

Mon, 26 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', '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-2026-76300 are related to improper control of a resource through its lifetime and are grouped under the Common Weakness Enumeration (CWE) CWE-664.
Title Security Hardening in Splunk Enterprise - October 2026
Weaknesses CWE-664
References

Subscriptions

Splunk Splunk Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-26T15:39:25.984Z

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

Link: CVE-2026-76300

cve-icon Vulnrichment

Updated: 2026-10-26T15:39:16.588Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T23:17:28.050

Modified: 2026-10-26T16:17:22.013

Link: CVE-2026-76300

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T18:15:14Z

Weaknesses
  • CWE-664

    Improper Control of a Resource Through its Lifetime