CVE-2023-33373Network attack vector

Device impersonation via cleartext credential storage

Published Aug 4, 2023 · Updated Oct 17, 2024

Cleartext credential storage in ConnectedIO Connected IO 2.1.0 and earlier allows attackers to exfiltrate credentials and impersonate devices. Public advisories identify unencrypted password and credential retention but do not disclose the storage resource or retrieval path. Network access is sufficient, with no privileges or user interaction required, and stolen credentials enable device impersonation.

CVSS severity9.8
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext credential storage in ConnectedIO Connected IO 2.1.0 and earlier allows attackers to exfiltrate credentials and impersonate devices. Public advisories identify unencrypted password and credential retention but do not disclose the storage resource or retrieval path. Network access is sufficient, with no privileges or user interaction required, and stolen credentials enable device impersonation.

The record

CVE
CVE-2023-33373
Published
Aug 4, 2023
Updated
Oct 17, 2024
Vendor
ConnectedIO
Product
Connected IO
Classifications
CWE-312, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2023CVE 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=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ConnectedIO · Connected IOversion=2.1.0

Published CVSS scores

9.8NIST NVDCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1552Unsecured Credentials

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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