CVE-2023-27855Network attack vector

Remote code execution via traversed upload filename

Published Mar 21, 2023 · Updated Feb 25, 2025

Path traversal in affected Rockwell Automation ThinManager ThinServer 6.x through 13.0.1 releases allows remote attackers to overwrite executables. ThinServer accepts the file_name in type 7 or 35 synchronization messages without restricting the destination before writing supplied fdata. TCP port 2031 is reachable without authentication; overwriting an executable grants code execution when that file runs.

CVSS severity9.8
Critical
EPSS probability13.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in affected Rockwell Automation ThinManager ThinServer 6.x through 13.0.1 releases allows remote attackers to overwrite executables. ThinServer accepts the file_name in type 7 or 35 synchronization messages without restricting the destination before writing supplied fdata. TCP port 2031 is reachable without authentication; overwriting an executable grants code execution when that file runs.

The record

CVE
CVE-2023-27855
Published
Mar 21, 2023
Updated
Feb 25, 2025
Vendor
Rockwell Automation
Product
ThinManager
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=11.0.0 - 11.0.5
  2. Affected versionversion=11.1.0 - 11.1.5
  3. Affected versionversion=11.2.0 - 11.2.6
  4. Affected versionversion=12.0.0 - 12.0.4
  5. Affected versionversion=12.1.0 - 12.1.5
  6. Affected versionversion=13.0.0 - 13.0.1
  7. Affected versionversion=6.x - 10.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · ThinManagerversion=11.0.0 - 11.0.5; version=11.1.0 - 11.1.5; version=11.2.0 - 11.2.6; version=12.0.0 - 12.0.4; version=12.1.0 - 12.1.5; version=13.0.0 - 13.0.1; version=6.x - 10.x

Published CVSS scores

9.8Rockwell AutomationCVSS: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 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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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