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CVE-2018-12086

30
FAUCET Score

CVE-2018-12086 describes a buffer overflow vulnerability in OPC UA applications, specifically impacting various Debian and OPC Foundation Unified Architecture products. This high-severity flaw (CVSS 7.5) allows unauthenticated remote attackers to trigger a denial-of-service condition through carefully crafted requests, requiring no user interaction. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, indicating a degree of awareness within the cybersecurity landscape.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.03.342CPE matchmatch criteria
cpe:2.3:a:opcfoundation:unified_architecture-.net-legacy:*:*:*:*:*:*:*:*
<= 1.03.343CPE matchmatch criteria
cpe:2.3:a:opcfoundation:unified_architecture-java:*:*:*:*:*:*:*:*
<= 1.03.352.12CPE matchmatch criteria
cpe:2.3:a:opcfoundation:unified_architecture_.net-standard:*:*:*:*:*:*:*:*
<= 1.03.340CPE matchmatch criteria
cpe:2.3:a:opcfoundation:unified_architecture_ansic:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
11.59%
Probability of exploitation in next 30 days
EPSS Percentile
95.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1159 is in the 93rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

nugetpatch availablevia ghsa
Product: OPCFoundation.NetStandard.Opc.UaFixed in: 1.4.353.15

Vendor Advisories (2)

nugetGHSA-782p-53wq-cxmjhigh

High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

Oct 16, 2018
redhatCVE-2018-12086Moderate

wireshark: OpcUa dissector crash

Oct 10, 2018

References

lists.opensuse.org / opensuse-security-announce/2020-03/msg00027.html
opcfoundation-onlineapplications.org / faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12086.pdf
Vendor Advisory
debian.org / security/2018/dsa-4359
Third Party Advisory
securityfocus.com / bid/105538
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041909
Third Party AdvisoryVDB Entry