CVE-2023-33378Network attack vector

Remote command execution via AT argument injection

Published Aug 4, 2023 · Updated Oct 17, 2024

Argument injection in ConnectedIO ER2000 2.1.0 and earlier allows remote attackers to execute arbitrary OS commands through an AT command message. The cioClient parser accepts comma-delimited MQTT payloads, and the AT-command handler fails to neutralize argument delimiters before invoking an operating-system command. Remote reachability requires publishing to the target device's MQTT DR topic; successful commands execute as root on the router.

CVSS severity9.8
Critical
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in ConnectedIO ER2000 2.1.0 and earlier allows remote attackers to execute arbitrary OS commands through an AT command message. The cioClient parser accepts comma-delimited MQTT payloads, and the AT-command handler fails to neutralize argument delimiters before invoking an operating-system command. Remote reachability requires publishing to the target device's MQTT DR topic; successful commands execute as root on the router.

The record

CVE
CVE-2023-33378
Published
Aug 4, 2023
Updated
Oct 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-88, T1059
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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

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-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1059Command and Scripting Interpreter

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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