MEDIUM
CVE-2020-29457
CWE-295Published: February 16, 2021· Updated: Jun 17, 2026
4.4
CVSS v3.1
Official Description
A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
Technical Analysis
CVE-2020-29457 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 4.4.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Affected Vendors & Products
opcfoundation1 product(s)
ua-.netstandard
Source: NVD CPE · 1 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
All References (6)
→
https://github.com/OPCFoundation/UA-.NETStandardThird Party Advisory
→
→
https://www.nuget.org/packages/OPCFoundation.NetStandard.Opc.Ua/Product · Third Party Advisory
→
https://github.com/OPCFoundation/UA-.NETStandardThird Party Advisory
→
→
https://www.nuget.org/packages/OPCFoundation.NetStandard.Opc.Ua/Product · Third Party Advisory
Quick Facts
CVE IDCVE-2020-29457
CVSS Score4.4 / 10
SeverityMEDIUM
WeaknessCWE-295
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 16, 2021
Related CVEs (CWE-295)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-29457 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.