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.

Published: 2023-03-21 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-27857 is rated Moderate Risk (64.9/100): CVSS High severity, with high exploitation likelihood (EPSS 18.34%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-27857

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 17.37% 18.34% +0.97%
2 2026-04-26 19.07% 17.37% -1.71%
3 2026-03-31 — 19.07% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-27857

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-27857

Affected software / configurations for CVE-2023-27857

Vendor Product Version Raw CPE
rockwellautomation thinmanager >= 11.0.0, < 11.0.5 cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
rockwellautomation thinmanager >= 11.1.0, < 11.1.5 cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
rockwellautomation thinmanager >= 11.2.0, < 11.2.6 cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
rockwellautomation thinmanager >= 12.0.0, < 12.0.3 cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
rockwellautomation thinmanager >= 12.1.0, < 12.1.4 cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
rockwellautomation thinmanager 13.0.0 cpe:2.3:a:rockwellautomation:thinmanager:13.0.0:*:*:*:*:*:*:*

References for CVE-2023-27857

cvelogic Threat Intelligence