What is CVE-2024-21866?

CVE-2024-21866 is a medium-severity vulnerability in Rapidscada Rapid Scada, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2024-02-02.

How severe is CVE-2024-21866?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Rapidscada Rapid Scada

CVE-2024-21866

In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the affected product responds back with an error message containing sensitive data if it receives a specific malformed request.

Published 2024-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Rapidscada Rapid Scada
Rapid Software Llc Scada — versions 0

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

www.cisa.gov/news-events/ics-advisories/icsa-24-011-03 (US Government Resource, Third Party Advisory)
rapidscada.org/contact/ (Product)

Frequently asked questions

What is CVE-2024-21866?: CVE-2024-21866 is a medium-severity vulnerability in Rapidscada Rapid Scada, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2024-02-02.
How severe is CVE-2024-21866?: Medium severity. CVSS v3 base score is 5.3 out of 10.