CVE-2021-26253: high-severity vulnerability in Splunk Enterprise
Bypass of Splunk Enterprise's implementation of DUO MFA
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.8%
A potential vulnerability in Splunk Enterprise's implementation of DUO MFA allows for bypassing the MFA verification in Splunk Enterprise versions before 8.1.6. The potential vulnerability impacts Splunk Enterprise instances configured to use DUO MFA and does not impact or affect a DUO product or service.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Splunk · Splunk EnterpriseRelated CVEs — Splunk Enterprise
In the same product, most dangerous first.
CVE-2026-20253CRITICALUnauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk EnterpriseEPSS 96.9%KEVCVE-2023-46214HIGHRemote code execution (RCE) in Splunk Enterprise through Insecure XML ParsingEPSS 89.2%CVE-2023-32707HIGH‘edit_user’ Capability Privilege EscalationEPSS 78.7%CVE-2022-43568HIGHReflected Cross-Site Scripting via the radio template in Splunk EnterpriseEPSS 42.8%CVE-2025-20297MEDIUMReflected Cross-Site Scripting (XSS) on Splunk Enterprise through dashboard PDF generation componentEPSS 31.2%CVE-2026-20251HIGHRemote Code Execution through Deserialization of Untrusted Data in Splunk Secure GatewayEPSS 30.6%