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October 9, 2026

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CVE-2026-101022NVD

Vulnerability Summary

A Modbus connection feature on openPDC accepts a caller-specified destination address and port with no restriction on which internal hosts may be targeted. An authenticated user can attempt connections to arbitrary internal network destinations, revealing which destinations are reachable. With repeated attempts, an attacker may be able to map the internal network.
Severity Level
MEDIUM(5.3)
Published Date
Oct 9, 2026
Last Modified
Oct 9, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
CWE-918: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 5.3 (MEDIUM)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)None
Availability (Vulnerable System)None
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
CVSS v3.1 Base Metrics — Score 4.3 (MEDIUM)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • Grid Protection Alliance openPDC < 2.9.477
  • Grid Protection Alliance openPDC < 2.9.482
  • Grid Protection Alliance openPDC (Docker image) < 2.9.477
  • Grid Protection Alliance openPDC (Docker image) < 2.9.482
  • Grid Protection Alliance openHistorian < 2.8.580
  • Grid Protection Alliance openHistorian < 2.8.585
Patched Versions
  • Grid Protection Alliance openPDC 2.9.477
  • Grid Protection Alliance openPDC 2.9.482
  • Grid Protection Alliance openPDC (Docker image) 2.9.477
  • Grid Protection Alliance openPDC (Docker image) 2.9.482
  • Grid Protection Alliance openHistorian 2.8.580
  • Grid Protection Alliance openHistorian 2.8.585
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🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References