HOMEVULNERABILITIESCVE-2019-19135
HIGH

CVE-2019-19135

CWE-330Published: March 16, 2020· Updated: Jun 17, 2026

7.4
CVSS v3.1

Official Description

In OPC Foundation OPC UA .NET Standard codebase 1.4.357.28, servers do not create sufficiently random numbers in OPCFoundation.NetStandard.Opc.Ua before 1.4.359.31, which allows man in the middle attackers to reuse encrypted user credentials sent over the network.

NVD Source

Technical Analysis

CVE-2019-19135 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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), full integrity compromise (data manipulation), with a CVSS base score of 7.4.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

opcfoundation2 product(s)
netstandard.opc.uaua-.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

PATCHhttps://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf
PATCHhttps://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf
ADVISORYhttps://opcfoundation.org/security-bulletins/
ADVISORYhttps://opcfoundation.org/security-bulletins/

All References (4)

→
https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdfPatch · Vendor Advisory
→
https://opcfoundation.org/security-bulletins/Vendor Advisory
→
https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdfPatch · Vendor Advisory
→
https://opcfoundation.org/security-bulletins/Vendor Advisory

Quick Facts

CVE IDCVE-2019-19135
CVSS Score7.4 / 10
SeverityHIGH
WeaknessCWE-330
CISA KEVNo
Affected1 vendor(s)
PublishedMar 16, 2020

Related CVEs (CWE-330)

CVE-2017-16924
9.8
CVE-2008-2433
9.8
CVE-2008-3612
9.8
CVE-2022-22922
9.8
CVE-2026-27755
9.8
CVE-2018-18602
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-19135 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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