Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-27855 is a critical-severity Path Traversal (CWE-22) vulnerability in Rockwellautomation Thinmanager. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2023-27855 is a path traversal vulnerability, tracked under CWE-22, that affects Rockwell Automation ThinManager ThinServer. The flaw manifests when the software processes certain messages and permits an attacker to manipulate file paths on the system hosting ThinServer.exe.
An unauthenticated remote attacker can exploit the issue over the network to upload arbitrary files into any directory where ThinServer.exe is installed. Successful exploitation allows the attacker to overwrite legitimate executables with attacker-controlled malicious content, resulting in remote code execution with full system impact as reflected by the CVSS 9.8 score.
The vendor advisory published at https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138640 details the affected versions and provides mitigation guidance along with available patches. The associated EPSS score has remained elevated, reaching a peak of 0.7401.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-31590
Vulnerability Data
In affected versions, a path traversal exists when processing a message in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker could potentially exploit this vulnerability to upload arbitrary files to any directory on the disk drive where ThinServer.exe is installed.…
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The attacker could overwrite existing executable files with attacker-controlled, malicious contents, potentially causing remote code execution.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.3.2
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Validates pathnames and filenames to prevent traversal outside intended directories.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Patching/maintenance can remediate known path-traversal flaws in deployed software (partial prevention of exploitability) but does nothing to stop the coding defect from being introduced in the first place.
PR.AA-05 defines and reviews access policies but does not address code-level pathname neutralization, so neither direction prevents CWE-22.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.