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Vulnerabilities/CVE-2026-76266Public Intelligence Dossier
Source: splunk · Limited verification•Last verified: •Collection Degraded
CVE-2026-76266Unknown / EvaluatingHIGH (raw)CVSS 7.7CWE-269

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

Published: 08 Oct 2026•Last updated: 14 Oct 2026, 05:52 PM IST•Source identifier: psirt@cisco.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.7HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Metric sourcepsirt@cisco.com
EPSS probability
0.1%0.001
Percentile2nd
Weakness type
CWE-269
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • splunk splunk · >= 9.4.0 < 9.4.15; >= 10.0.0 < 10.0.10; >= 10.2.0 < 10.2.7; >= 10.4.0 < 10.4.3 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched privilege-escalation (CWE-269, CVSS AV:L)

Exposure

  1. Identify affected hosts and verify the local product version.Telemetry: DeviceTvmSoftwareVulnerabilities · Local attack-vector scoring does not imply every host is vulnerable. · Rule privilege-escalation

Exploitation evidence

  1. Review unusual privilege changes and process lineage on affected hosts.Telemetry: DeviceProcessEvents · Privilege transitions provide a focused investigation starting point. · Rule privilege-escalation

Response

  1. Confirm the source-stated update on affected hosts.Telemetry: DeviceTvmSoftwareVulnerabilities · Host inventory can verify remediation. · Rule privilege-escalation

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
psirt@cisco.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*, cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Evidence & Provenance

2 public sources
advisory.splunk.comSource recordnvd.nist.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-76266
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-76266
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-76266"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.