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VulnerabilityCVE-2026-76266Published 2026-10-07

CVE-2026-76266 — Splunk Enterprise

high

As of 2026-10-09, CVE-2026-76266 is a HIGH-severity vulnerability in Splunk Enterprise, CVSS v3.1 7.7, EPSS 0.1% (1.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-76266, most recently “Splunk Enterprise and Secure Gateway: 22 vulnerabilities patched (SVD-2026-1001/1002), including critical CVE-2026-76268 (Patroni REST API missing authentication, CVSS 9.8) and CVE-2026-76281 (listed 9.8 in advisory)”.

CVSS v3.1
7.7/10High
EPSS
0.1%Higher than 1.8% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
3.9/10Threadlinqs triage score
Published
Updated 2026-10-09
CVSS v3.1 7.7 (HIGH) · EPSS 0.1% (higher than 1.8% of all scored CVEs) · Priority 3.9/10 · Published 2026-10-07

Last updated:

What is CVE-2026-76266?

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will.

The record classifies CVE-2026-76266 under weakness class CWE-269. Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 3 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.7 — HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 1.8% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
3.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-10-07, last modified 2026-10-09

Is CVE-2026-76266 being exploited?

It currently carries a trending score of 35 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-76266

No vendor patch reference has been recorded for CVE-2026-76266 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-76266

1 tracked threat in the Threadlinqs corpus references CVE-2026-76266, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .

Other references