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CVE-2023-27857

Rockwell Automation ThinManager ThinServer Heap-Based Buffer Overflow

HIGH
7.5
CVSS Score
Published: March 22, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:45 AM UTC
2 products affected across 1 vendorThinManagerThinManager ThinServer

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Severity
HIGH7.5
Exploit prediction
EPSS 18%
SSVC
No known exploit

Description

In affected versions, a heap-based buffer over-read condition occurs when the message field indicates more data than is present in the message field in Rockwell Automation's ThinManager ThinServer.  An unauthenticated remote attacker can exploit this vulnerability to crash ThinServer.exe due to a read access violation.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

ThinManager· Rockwell Automation
95%
11.0.0 ≤ v < 11.0.511.1.0 ≤ v < 11.1.511.2.0 ≤ v < 11.2.612.0.0 ≤ v < 12.0.312.1.0 ≤ v < 12.1.413.0.0
Affected range stops below 11.0.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.1.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.2.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.0.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.1.4, so it looks safe — our inference, not a vendor statement
ThinManager ThinServer· Rockwell Automation
60%
11.0.0 - 11.0.511.1.0 - 11.1.511.2.0 - 11.2.612.0.0 - 12.0.412.1.0 - 12.1.513.0.0 - 13.0.16.x - 10.x

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138640

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHRockwell
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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