CVE-2018-12086

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

Published: 2018-09-14 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-12086 is rated Moderate Risk (63.6/100): CVSS High severity, with high exploitation likelihood (EPSS 25.63%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-12086

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-27 25.73% 25.63% -0.11%
2 2025-11-21 44.17% 25.73% -18.44%
3 2025-11-18 — 44.17% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-12086

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-12086

GitHub Security Advisory for CVE-2018-12086

GHSA-782p-53wq-cxmj · Severity: high · Ecosystem: nuget — High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

OS Trackers for CVE-2018-12086

vendor priority summary link
alpine high CVE-2018-12086: 1 source package rows (wireshark); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2018-12086
debian not yet assigned CVE-2018-12086 not yet assigned priority: Debian including 1 source packages (wireshark), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-12086
redhat medium — https://access.redhat.com/security/cve/CVE-2018-12086
suse high CVE-2018-12086 severity important: SUSE including 108 source package names (1.1.1.23.352:libmaxminddb0-1.4.2-1.3.1, 1.5.0:libmaxminddb0-1.4.2-1.3.1, …), 790 product×package rows across 323 product lines (Container containers/apache-pulsar, Container suse/bind, … (323 product lines)): Fixed 608, Known Not Affected 182. https://www.suse.com/security/cve/CVE-2018-12086/
ubuntu medium CVE-2018-12086 medium priority: Ubuntu including 1 source packages (wireshark), 5 status rows across 5 suites (bionic, focal, trusty, upstream, xenial): not-affected 4, released 1. https://ubuntu.com/security/CVE-2018-12086

Affected software / configurations for CVE-2018-12086

Vendor Product Version Raw CPE
opcfoundation unified_architecture-.net-legacy <= 1.03.342 cpe:2.3:a:opcfoundation:unified_architecture-.net-legacy:*:*:*:*:*:*:*:*
opcfoundation unified_architecture-java <= 1.03.343 cpe:2.3:a:opcfoundation:unified_architecture-java:*:*:*:*:*:*:*:*
opcfoundation unified_architecture_.net-standard <= 1.03.352.12 cpe:2.3:a:opcfoundation:unified_architecture_.net-standard:*:*:*:*:*:*:*:*
opcfoundation unified_architecture_ansic <= 1.03.340 cpe:2.3:a:opcfoundation:unified_architecture_ansic:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2018-12086

cvelogic Threat Intelligence