CVE-2026-20139Network attack vector

Client-side denial of service via profile payloads

Published Feb 18, 2026 · Updated Feb 18, 2026

Client-side denial of service in Splunk Web allows remote authenticated users to make Splunk Enterprise and Splunk Cloud Platform unresponsive. Affected releases are Enterprise 10.0.0 through 10.0.1, 9.4.0 through 9.4.7, 9.3.0 through 9.3.8, and 9.2.0 through 9.2.11, plus Cloud Platform before 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, and 9.3.2411.121. The password-change endpoint accepts attacker-controlled realname, tz, or email values that Splunk Web processes with excessive client resource use; a low-privileged account without admin or power and Splunk Web enabled are required.

CVSS severity4.3
Medium
EPSS probability4.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Client-side denial of service in Splunk Web allows remote authenticated users to make Splunk Enterprise and Splunk Cloud Platform unresponsive. Affected releases are Enterprise 10.0.0 through 10.0.1, 9.4.0 through 9.4.7, 9.3.0 through 9.3.8, and 9.2.0 through 9.2.11, plus Cloud Platform before 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, and 9.3.2411.121. The password-change endpoint accepts attacker-controlled realname, tz, or email values that Splunk Web processes with excessive client resource use; a low-privileged account without admin or power and Splunk Web enabled are required.

The record

CVE
CVE-2026-20139
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
Zoom Video Communications, Inc.
Product
Splunk Enterprise
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0 <10.0.2
  2. Affected versionversion=9.2 <9.2.12
  3. Affected versionversion=9.3 <9.3.9
  4. Affected versionversion=9.4 <9.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Splunk Enterpriseversion=10.0 <10.0.2; version=9.2 <9.2.12; version=9.3 <9.3.9; version=9.4 <9.4.8
Zoom Video Communications, Inc. · Splunk Cloud Platformversion=10.0.2503 <10.0.2503.9; version=10.1.2507 <10.1.2507.8; version=10.2.2510 <10.2.2510.3; version=9.3.2411 <9.3.2411.121

Published CVSS scores

4.3Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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