---
title: "CVE-2026-100730: openPDC & openHistorian - Insecure Deserialization"
description: "openPDC and openHistorian contain an insecure deserialization vulnerability caused by deserializing client-supplied data structures in the service console interface, letting attackers execute remote code under service account privileges, exploit requires authentication on Windows Authentication systems or none otherwise."
url: https://panop.io/threat-heartbeat/CVE-2026-100730/
---

# CVE-2026-100730 openPDC & openHistorian - Insecure Deserialization

openPDC and openHistorian contain an insecure deserialization vulnerability caused by deserializing client-supplied data structures in the service console interface, letting attackers execute remote code under service account privileges, exploit requires authentication on Windows Authentication systems or none otherwise.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.62% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100730)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Update to the latest version with deserialization fixes or apply vendor patches.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100730](https://nvd.nist.gov/vuln/detail/CVE-2026-100730)
- [https://github.com/cisagov/CSAF/blob/develop/csaf\_files/OT/white/2026/icsa-26-281-02.json](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-02.json)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-02](https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-02)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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