HOMEVULNERABILITIESCVE-2018-12087
MEDIUM

CVE-2018-12087

CWE-295Published: October 3, 2018· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

Failure to validate certificates in OPC Foundation UA Client Applications communicating without security allows attackers with control over a piece of network infrastructure to decrypt passwords.

NVD Source

Technical Analysis

CVE-2018-12087 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.3.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeChanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected Vendors & Products

opcfoundation2 product(s)
ua-.net-legacyua-.netstandard
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12087.pdf
ADVISORYhttps://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12087.pdf

All References (2)

→
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12087.pdfMitigation · Vendor Advisory
→
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2018-12087.pdfMitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2018-12087
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-295
CISA KEVNo
Affected1 vendor(s)
PublishedOct 3, 2018

Related CVEs (CWE-295)

CVE-2026-4370
10.0
CVE-2021-29656
9.8
CVE-2026-9258
9.8
CVE-2026-20184
9.8
CVE-2022-22885
9.8
CVE-2022-21654
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-12087 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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