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TI-2020-16616 Aliases CVE-2020-27295GHSA-gc6c-6m8m-8g6g

Uncontrolled resource consumption in OPC UA Tunneller

Priority LOW 36CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

The affected product has uncontrolled resource consumption issues, which may allow an attacker to cause a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).

Why it matters now

EPSS 0.01485 74th percentileScored 2026-11-07
Fix Fixed OPC UA Tunneller: 6.3.0.8233

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—OPC UA Tunnellerbefore 6.3.0.82336.3.0.8233Patch availableCNA
  • OPC UA Tunneller Vendor— Affected before 6.3.0.8233 Fixed in 6.3.0.8233 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:honeywell:opc_ua_tunneller:*:*:*:*:*:*:*:*before 6.3.0.8233VulnerableHoneywell
  • cpe:2.3:a:honeywell:opc_ua_tunneller:*:*:*:*:*:*:*:* Versions before 6.3.0.8233 Vulnerable ·Honeywell

Remediation

  • Fix · CNA OPC UA Tunneller Fixed in 6.3.0.8233

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27295
  2. 2026-10-03 Alias added: GHSA-gc6c-6m8m-8g6g

References

Advisory 1

  • TI-2020-16617 Heap-based buffer overflow in OPC UA Tunneller CVSS 3.1CRITICAL 9.8
  • TI-2020-16619 Out-of-bounds read in OPC UA Tunneller CVSS 3.1CRITICAL 9.1
  • TI-2020-16598 Improper check for unusual conditions in OPC UA Tunneller CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences