The STTP-based data publisher on openPDC accepts network connections without authentication in its default configuration. An unauthenticated network attacker can connect to this interface and exchange data with it.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Grid Protection Alliance openPDC unaffected
Version Status Constraints
0 affected < 2.9.477
0 affected < 2.9.482
2.9.482 unaffected —
Grid Protection Alliance openPDC (Docker image) unaffected
Version Status Constraints
0 affected < 2.9.477
0 affected < 2.9.482
Grid Protection Alliance openHistorian unaffected
Version Status Constraints
0 affected < 2.8.580
0 affected < 2.8.585
2.8.585 unaffected —

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Grid Protection Alliance updated the default configuration to bind this interface to the local loopback address only. This change applies to new installations; existing installations upgraded from an earlier version retain their prior configuration and will not receive the new default automatically. Operators should verify their configuration explicitly and update the interface binding if it is still set to accept connections on all interfaces.

Workaround

Grid Protection Alliance does not recommend production use of published Docker images in any case. The fix for this vulnerability has not been published to the Docker image.

References
Link Providers
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-02.json cve-icon cve-icon
https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-02 cve-icon cve-icon
History

Fri, 09 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description The STTP-based data publisher on openPDC accepts network connections without authentication in its default configuration. An unauthenticated network attacker can connect to this interface and exchange data with it.
Title Grid Protection Alliance openPDC and openHistorian Missing Authentication for Critical Function
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-10-09T13:52:01.605Z

Reserved: 2026-10-05T16:54:01.625Z

Link: CVE-2026-85479

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-09T14:17:23.983

Modified: 2026-10-09T16:41:53.540

Link: CVE-2026-85479

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T16:00:10Z

Weaknesses