CVE-2023-0321Known exploitationPublic exploitNetwork attack vector

Configuration file disclosure and modification via unauthenticated PakBus

Published Jan 25, 2023 · Updated Mar 27, 2025

Improper access control in Campbell Scientific CR6, CR300, CR800, CR1000, and CR3000 allows remote attackers to access configuration files. The PakBus service on TCP port 6785 accepts unauthenticated file downloads and arbitrary uploads despite web-interface access controls, exposing plaintext credentials. Factory-default HTTP and PakBus exposure permits configuration disclosure and replacement without an account or user interaction.

CVSS severity9.1
Critical
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Campbell Scientific CR6, CR300, CR800, CR1000, and CR3000 allows remote attackers to access configuration files. The PakBus service on TCP port 6785 accepts unauthenticated file downloads and arbitrary uploads despite web-interface access controls, exposing plaintext credentials. Factory-default HTTP and PakBus exposure permits configuration disclosure and replacement without an account or user interaction.

The record

CVE
CVE-2023-0321
Published
Jan 25, 2023
Updated
Mar 27, 2025
Vendor
Campbell Scientific
Product
CR3000
Classifications
CWE-200, T1190, T1105
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2025Record 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=all version

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Campbell Scientific · CR3000version=all version
Campbell Scientific · CR6version=all version
Campbell Scientific · CR300version=all version
Campbell Scientific · CR1000version=all version
Campbell Scientific · CR800version=all version

Published CVSS scores

9.1INCIBECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application
T1105Ingress Tool Transfer

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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