CVE-2023-27857
Rockwell Automation ThinManager ThinServer Heap-Based Buffer Overflow
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Rockwell Automation ThinManager ThinServer Heap-Based Buffer Overflow
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.
- Record
CVE-2023-27857- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2023-31592
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.
- Record
EUVD-2023-31592- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pr5c-7q57-fp6g
In affected versions, a heap-based buffer over-read condition occurs when the message field...
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.
- Record
GHSA-pr5c-7q57-fp6g- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-27857- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-27857 is a high vulnerability (CVSS 7.5) in Rockwell Automation Thinmanager Thinserver, published March 22, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 18.3%, the 97th percentile. No source names a fixed version.