RCE in Nelio Software Ab Testing

CVE-2026-32573

Improper Control of Generation of Code ('Code Injection') vulnerability in Nelio Software Nelio AB Testing nelio-ab-testing allows Code Injection.This issue affects Nelio AB Testing: from n/a through <= 8.2.7.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-32573: held from 0.003 to 0.005.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-32573?
CVE-2026-32573 is a critical-severity vulnerability in Nelio Software Ab Testing, classified under Code Injection. CVSS score: 9.1/10. Published 2026-03-25.
How severe is CVE-2026-32573?
Critical severity. CVSS v3 base score is 9.1 out of 10.