CVE-2023-27978
Published: 21 March 2023
Summary
CVE-2023-27978 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Schneider-Electric Custom Reports. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 11.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A CWE-502 deserialization of untrusted data vulnerability affects the Dashboard module in Schneider Electric IGSS products, specifically IGSS Data Server (IGSSdataServer.exe), IGSS Dashboard (DashBoard.exe), and Custom Reports (RMS16.dll) versions 16.0.0.23040 and earlier. The flaw allows an attacker-supplied payload to be interpreted during deserialization, which can result in remote code execution on the affected system.
An unauthenticated attacker can exploit the issue by convincing a user to open a malicious file, after which arbitrary code executes with the privileges of the victim process. The attack requires local access and user interaction but needs no prior authentication or elevated privileges, producing high impact to confidentiality, integrity, and availability.
Schneider Electric published security notice SEVD-2023-073-04 that addresses the affected IGSS components and provides remediation guidance.
The EPSS score rose from a low baseline to a peak of 0.1495 on 2025-12-11 before receding to the current value of 0.0390, indicating that exploitation interest increased after public disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-31704
Vulnerability details
A CWE-502: Deserialization of Untrusted Data vulnerability exists in the Dashboard module that could cause an interpretation of malicious payload data, potentially leading to remote code execution when an attacker gets the user to open a malicious file. Affected Products:…
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IGSS Data Server(IGSSdataServer.exe)(V16.0.0.23040 and prior), IGSS Dashboard(DashBoard.exe)(V16.0.0.23040 and prior), Custom Reports(RMS16.dll)(V16.0.0.23040 and prior).
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
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.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.