Is CVE-2026-20240 actively exploited?

No active exploitation of CVE-2026-20240 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20240 be exploited remotely?

Yes. CVE-2026-20240 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20240?

CVE-2026-20240 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-20240

CWE-20Published: May 20, 2026· Updated: May 21, 2026

6.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.8th

Official Description

In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories.

NVD Source

Technical Analysis

CVE-2026-20240 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.