CVE-2026-52134 in libiec61850
Summary
by MITRE • 08/01/2026
An issue in the parseGoosePayload() function (/goose/goose_receiver.c) of libiec61850 v1.6 allows attackers to bypass authentication via a captured GOOSE frame.
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Analysis
by VulDB Data Team • 08/01/2026
The vulnerability resides within the libiec61850 v1.6 library's parseGoosePayload() function located in the goose/goose_receiver.c file, representing a critical security flaw that undermines the integrity of IEC 61850 communication protocols used extensively in industrial control systems. This issue stems from inadequate validation mechanisms within the GOOSE (Generic Object Oriented Substation Event) frame processing logic, which is fundamental to substation automation systems where real-time control and monitoring occur. The flaw allows attackers to exploit captured GOOSE frames through a process known as replay attacks, effectively bypassing authentication mechanisms that should prevent unauthorized system access.
The technical implementation of this vulnerability involves the improper handling of message sequence numbers and timestamp validation within the parseGoosePayload() function. When an attacker captures legitimate GOOSE frames from a network, they can manipulate these frames to appear valid to the receiving system by exploiting weak cryptographic checks or missing authentication validations. This weakness in the protocol stack enables attackers to inject false data into critical substation automation systems, potentially leading to unauthorized control actions or disruption of normal operations. The vulnerability specifically targets the authentication bypass mechanism where frame integrity checks fail to properly validate the source authenticity, allowing crafted frames to be accepted as legitimate.
From an operational perspective, this vulnerability presents severe implications for industrial control system security and aligns with attack patterns documented in the MITRE ATT&CK framework under the 'Defense Evasion' and 'Initial Access' tactics. The impact extends beyond simple authentication bypass to potentially enable complete system compromise when combined with other attack vectors, as GOOSE messages are critical for protection relay operations and real-time control within power grid infrastructure. Organizations using libiec61850 v1.6 in their substation automation environments face significant risk of unauthorized system manipulation, data corruption, or denial-of-service conditions that could affect power grid stability and safety. The vulnerability's exploitation requires minimal technical expertise compared to the potential damage, making it particularly dangerous in operational technology environments where security may be less prioritized than availability.
Effective mitigation strategies must address both immediate remediation and long-term architectural improvements for industrial control systems. Organizations should prioritize upgrading to libiec61850 versions that contain fixed authentication mechanisms and implement proper frame sequence number validation within the GOOSE processing pipeline. Network segmentation and monitoring solutions should be deployed to detect anomalous GOOSE traffic patterns, while implementing cryptographic protection mechanisms such as message authentication codes or digital signatures for all IEC 61850 communications. The vulnerability also highlights the importance of following cybersecurity standards like NIST SP 800-82 for industrial control systems and aligns with CWE-310 which addresses cryptographic issues in protocol implementations. Regular security assessments and penetration testing of IEC 61850 systems should be conducted to identify similar authentication bypass vulnerabilities that could compromise critical infrastructure operations.