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Splunk CVE-2025-20370

| EUVDEUVD-2025-32717 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2025-10-01 psirt@cisco.com
4.9
CVSS 3.1 · Vendor: cisco
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK

1 technique across 1 tactic: Impact

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

Service disruption affecting availability. In critical infrastructure, DoS can have cascading effects on dependent systems. With a CVSS score of 4.9 (MEDIUM), this represents a moderate risk.

Exploit ScenarioDerived

An attacker sends specially crafted requests that cause excessive resource consumption (CPU, memory, disk) or trigger a crash in the target application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 13, 2026

In Splunk Enterprise versions below 10.0.1, 9.4.4, 9.3.6, and 9.2.8, and Splunk Cloud Platform versions below 9.3.2411.108, 9.3.2408.118 and 9.2.2406.123, a user who holds a role that contains the high-privilege capability change_authentication, could send multiple LDAP bind requests to a specific internal endpoint, resulting in high server CPU usage, which could potentially lead to a denial of service (DoS) until the Splunk Enterprise instance is restarted. See https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities and https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/use-ldap-as-an-authentication-scheme/configure-ldap-with-splunk-web#cfe47e31_007f_460d_8b3d_8505ffc3f0dd__Configure_LDAP_with_Splunk_Web for more information.

Earlier versions of this analysis (1)
v1 Mar 13, 2026 - 18:18 CVSS 4.9

RemediationAI

Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.

Affected VersionsENISA

Splunk Enterprise 9.3 <9.3.6
Splunk Enterprise 9.4 <9.4.4
Splunk Enterprise 10.0 <10.0.1
Splunk Enterprise 9.2 <9.2.8
Splunk Enterprise Cloud 9.2.2406 <9.2.2406.123
Splunk Enterprise Cloud 9.3.2411 <9.3.2411.108
Splunk Enterprise Cloud 9.3.2408 <9.3.2408.118

Affected Packages

euvd splunk_enterprise fix: 9.2.8, 9.3.6, 9.4.4, 10.0.1
euvd splunk_enterprise_cloud fix: 9.2.2406.123, 9.3.2408.118, 9.3.2411.108

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400).

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cisco) PRIMARY 4.9 MEDIUM
AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Primary rating from Vendor (cisco) · only source for this CVE.

CVSS VectorVendor: cisco

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
9.3.6,9.4.4,10.0.1
CVE Published
Oct 01, 2025 - 17:15 nvd
MEDIUM 4.9

Executive ViewAI

Why It Matters

Organizations using Splunk Enterprise should be aware of moderate risk from CVE-2025-20370, a resource exhaustion vulnerability rated CVSS 4.9. Service availability could be impacted. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: implement rate limiting and resource quotas.

Threat Intelligence Overview

EPSS Score
0.1%
Top 69% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

24
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +24
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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