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Fencer Vulns
medium 5.3

CVE-2024-21866 json

Generation of Error Message Containing Sensitive Information in Rapid SCADA

published 2024-02-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-19477

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-011-03 updated cvss 5.3

Rapid Software LLC Rapid SCADA

  • Rapid Software LLC Rapid SCADA <=5.8.4
    affected: mitigation “Rapid Software did not respond to CISA's attempts at coordination. Users of RapidSCADA are encouraged to contact Rapid Software and keep their systems up to date.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Rapid Software LLC Rapid SCADA

Classification

Weakness
  • CWE-209 Generation of Error Message Containing Sensitive Information

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.