What’s Vulnerable › Vulnerabilities

CVE-2021-26253: Bypass of Splunk Enterprise's implementation of DUO MFA

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-06 · updated 2026-06-17
• Weakness: CWE-287

Description

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.

Affected products

• Splunk Enterprise: from 8.1.0 before 8.1.6 — fixed in 8.1.6

How to fix

Upgrade to a fixed version: Splunk Enterprise 8.1.6. Check the vendor advisory for mitigations.

References

• https://www.splunk.com/en_us/product-security/announcements/svd-2022-0504.html
• https://www.splunk.com/en_us/product-security/announcements/svd-2022-0504.html

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