CVE-2026-100730: Grid Protection Alliance openPDC and openHistorian Deserialization of Untrusted Data
A service console interface on openPDC and openHistorian deserializes a client-supplied data structure. On systems using Windows Authentication, an attacker must already be authenticated to reach this function; on systems without Windows Authentication, this is reachable by an unauthenticated network attacker. This allows an attacker to trigger deserialization of an arbitrary object graph, which could allow remote code execution under the privileges of the affected service account.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
openPDCto a version that resolves this vulnerability.Fixed in 2.9.482 - Upgrade
Upgrade
openHistorianto a version that resolves this vulnerability.Fixed in 2.8.585
Event History
Frequently Asked Questions
Who can exploit the affected service console interface?
Deployments without Windows Authentication expose the interface to unauthenticated network attackers. Where Windows Authentication is enabled, an attacker must already be authenticated to access the vulnerable function.
What level of access could successful exploitation provide?
An attacker can cause deserialization of an arbitrary object graph, which could result in remote code execution. Any resulting code would run with the privileges of the affected service account.
How can I determine whether my deployment has unauthenticated exposure?
Determine whether the affected openPDC or openHistorian system uses Windows Authentication for its service console interface. Systems not using Windows Authentication are reachable by an unauthenticated network attacker.