Description

OMICRON StationGuard 4.00 contains an improper input validation vulnerability in its IEC 61850 Sampled Values (SV) frame processing. A specially crafted SV frame can cause the affected process to terminate, disrupting alert processing for Sampled Values traffic. The vulnerability does not affect overall system availability or the processing of other traffic types, and the process is automatically restarted, and the failure is immediately reported to the user.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.3",
  "pubDate": "2026-08-06T14:16:22.020Z",
  "pubdate": "2026-08-06T14:16:22.020Z",
  "executiveSummary": "OMICRON StationGuard 4.00 contains an improper input validation vulnerability within its IEC 61850 Sampled Values (SV) frame processing subsystem.\nThe vulnerability allows an unauthenticated adversary capable of transmitting network traffic to cause a denial-of-service condition affecting specifically the IEC 61850 Sampled Values alert processing functionality.\nSuccessful exploitation results in the forced termination of the affected background process upon the ingestion of a specially crafted SV frame.\nWhile the broader system availability and the processing of alternative network traffic types remain unaffected, the crash temporarily disrupts monitoring and alerting capabilities tied to Sampled Values traffic until the automated process recovery mechanism restores service.\nThe affected product is OMICRON StationGuard version 4.00.\nThe risk implications are constrained to localized monitoring degradation within industrial control system networks utilizing IEC 61850 protocol streams.\nAttacker capabilities require network adjacency or visibility into the target network segment to inject malicious SV frames into the communications channel.\nNo specific authentication or specialized execution privileges are explicitly detailed as prerequisites beyond network access to transmit the crafted protocol frames.",
  "technicalDetails": "The root cause of the vulnerability stems from improper input validation logic implemented within the IEC 61850 Sampled Values (SV) frame parsing engine of OMICRON StationGuard 4.00.\nThe vulnerable component is responsible for decoding and analyzing real-time digitized analog values transmitted over Ethernet frames in substation automation environments.\nAffected versions are strictly limited to OMICRON StationGuard 4.00.\nThe attack vector involves network exposure to the IEC 61850 Sampled Values traffic stream.\nAuthentication requirements and privilege requirements are minimal, as the injection of raw Layer 2 or Layer 3 protocol frames generally does not require valid session credentials in standard substation configurations.\nThe payload behavior involves the generation and transmission of a specially crafted IEC 61850 SV frame containing anomalous data structures, malformed fields, or unexpected length parameters designed to trigger parsing exceptions during execution.\nStep-by-step exploitation occurs as follows: first, the malicious actor crafts an invalid or anomalous IEC 61850 SV frame; second, the attacker transmits the frame onto the network segment monitored by OMICRON StationGuard 4.00; third, the StationGuard parsing engine ingests the frame and encounters the improper input validation condition while attempting to decode the malformed fields; fourth, the parsing exception triggers an unhandled error state, resulting in the immediate termination of the target process.\nThe post-exploitation impact and failure behavior are characterized by the sudden disruption of alert processing specifically for Sampled Values traffic.\nUpon process termination, the operating environment automatically executes a process restart to restore functionality, and the failure condition is immediately reported to the user interface or system logs.\nThe vulnerability does not facilitate arbitrary code execution, privilege escalation, or systemic compromise of overall device availability, nor does it impact the processing capabilities assigned to other network protocol traffic types."
}