CVE-2024-21764Network attack vector

Unauthenticated server access via hard-coded credentials

Published Feb 1, 2024 · Updated Oct 17, 2024

Use of hard-coded credentials in Rapid Software LLC Rapid SCADA 5.8.4 and earlier allows remote attackers to connect to a server port. The product accepts an embedded credential for inbound authentication, but CISA has not disclosed the responsible component, credential, protocol, or port. Access requires network reachability but no prior privileges or user interaction; the available post-login operations remain undisclosed.

CVSS severity9.8
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of hard-coded credentials in Rapid Software LLC Rapid SCADA 5.8.4 and earlier allows remote attackers to connect to a server port. The product accepts an embedded credential for inbound authentication, but CISA has not disclosed the responsible component, credential, protocol, or port. Access requires network reachability but no prior privileges or user interaction; the available post-login operations remain undisclosed.

The record

CVE
CVE-2024-21764
Published
Feb 1, 2024
Updated
Oct 17, 2024
Vendor
Rapid Software LLC
Product
Rapid SCADA
Classifications
CWE-798, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rapid Software LLC · Rapid SCADAversion=0 <=5.8.4

Published CVSS scores

9.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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