What is CVE-2024-21764?

CVE-2024-21764 is a critical-severity vulnerability in Rapidscada Rapid Scada, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2024-02-02.

How severe is CVE-2024-21764?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Rapidscada Rapid Scada

CVE-2024-21764

In Rapid Software LLC's Rapid SCADA versions prior to Version 5.8.4, the product uses hard-coded credentials, which may allow an attacker to connect to a specific port.

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Rapidscada Rapid Scada
Rapid Software Llc Scada — versions 0

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

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-2024-21764?: CVE-2024-21764 is a critical-severity vulnerability in Rapidscada Rapid Scada, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2024-02-02.
How severe is CVE-2024-21764?: Critical severity. CVSS v3 base score is 9.8 out of 10.