What is CVE-2026-76299?

CVE-2026-76299 is a critical-severity vulnerability in Splunk Enterprise, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-10-21.

How severe is CVE-2026-76299?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Splunk Enterprise

CVE-2026-76299

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-2026-76299 are related to improper access control and are grouped under the Common Weakness Enumeration (CWE) CWE-284.

Published 2026-10-21 · last modified 2026-10-22.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Splunk Enterprise

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2026-76299?: CVE-2026-76299 is a critical-severity vulnerability in Splunk Enterprise, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-10-21.
How severe is CVE-2026-76299?: Critical severity. CVSS v3 base score is 9.9 out of 10.