Is CVE-2026-20138 actively exploited?

No active exploitation of CVE-2026-20138 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20138 be exploited remotely?

Partially. CVE-2026-20138 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2026-20138?

CVE-2026-20138 has a CVSS score of 6.8 (MEDIUM) and an EPSS exploitation probability of 0.04%.

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MEDIUM

CVE-2026-20138

CWE-532Published: February 18, 2026· Updated: Feb 20, 2026

6.8

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:4.2th

Official Description

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.7, 9.3.9, and 9.2.11, a user of a Splunk Search Head Cluster (SHC) deployment who holds a role with access to the Splunk `_internal` index could view the `integrationKey`, `secretKey`, and `appSecretKey` secrets, generated by [Duo Two-Factor Authentication for Splunk Enterprise](https://duo.com/docs/splunk), in plain text.

NVD Source

Technical Analysis

CVE-2026-20138 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.