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CVE-2026-21411 - OpenBlocks IDM RX1 (FW5.0.x) Plugin

CVE-2026-21411

Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may allow an attacker to bypass administrator authentication and change the password.

CVE-2026-21411

HIGH CVSS 8.7 Published 2026-01-06 Updated 2026-01-08
AI Risk High (84/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P2 Urgent
Severity Band HIGH
CVSS Vector CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected Components 6
Reference Links 2
AI Risk Engine High (84/100)
Exploitability High
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2026-01-06 CVE published and first recorded in the threat feed.
  2. 2026-01-08 Record updated with latest vulnerability metadata.
  3. 2026-04-09 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 13 days ago

AI enriched 13 days ago (2026-04-09 08:09 UTC)

Technical Summary

Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may allow an attacker to bypass administrator authentication and change the password.

Potential Impact

Severity is HIGH (CVSS 8.7). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as High based on low-bar exploit prerequisites.

Primary risk drivers: low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

OpenBlocks IDM RX1 (FW5.0.x) PLUGIN · openblocks-idm-rx1-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
OpenBlocks IoT DX1 (FW5.0.x) PLUGIN · openblocks-iot-dx1-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
OpenBlocks IoT EX/BX models (FW5.0.x) PLUGIN · openblocks-iot-ex-bx-models-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
OpenBlocks IoT FX1 (FW5.0.x) PLUGIN · openblocks-iot-fx1-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
OpenBlocks IoT VX2 (FW5.0.x) PLUGIN · openblocks-iot-vx2-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
OpenBlocks IX9 models with FW (FW5.0.x) PLUGIN · openblocks-ix9-models-with-fw-fw5-0-x Affected: >= allversionspriortoFW5.0.8, <= allversionspriortoFW5.0.8 Fixed version not specified
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