CVE-2018-12086 High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

What is CVE-2018-12086?

CVE-2018-12086 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 14 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Weakness: CWE-787

Which versions are affected by CVE-2018-12086?

2 open source packages ship an affected version, including OPCFoundation.NetStandard.Opc.Ua. It affects 5 products.

Products include Debian Debian Linux, Opcfoundation Unified Architecture-.Net-Legacy, Opcfoundation Unified Architecture-Java, Opcfoundation Unified Architecture .Net-Standard, Opcfoundation Unified Architecture Ansic.

How do I fix CVE-2018-12086?

Upgrade OPCFoundation.NetStandard.Opc.Ua to 1.4.353.15 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-12086 being exploited?

There is no known exploitation of CVE-2018-12086 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-12086, GHSA-782p-53wq-cxmj.