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TI-2020-16598 Aliases CVE-2020-27274GHSA-p5jr-488h-j8p7

Improper check for unusual conditions in OPC UA Tunneller

Priority LOW 35CWE-754Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Some parsing functions in the affected product do not check the return value of malloc and the thread handling the message is forced to close, which may lead to a denial-of-service condition on the OPC UA Tunneller (versions prior to 6.3.0.8233).

Why it matters now

EPSS 0.01164 67th 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-2020-27274
  2. 2026-10-03 Alias added: GHSA-p5jr-488h-j8p7

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-2020-16616 Uncontrolled resource consumption 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