How severe is CVE-2020-29457?

CVE-2020-29457 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-29457 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29457?

CVE-2020-29457 affects Opcfoundation Ua-.netstandard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29457?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-29457 published?

CVE-2020-29457 was published on 2021-02-16 and last updated on 2026-06-17.

CVE-2020-29457

CVE-2020-29457 is a medium-severity vulnerability in Opcfoundation Ua-.netstandard with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v2: 2.1
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Opcfoundation Ua-.netstandard
Published: 2021-02-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-29457?: A Privilege Elevation vulnerability in OPC UA .NET Standard Stack 1.4.363.107 could allow a rogue application to establish a secure connection.
How severe is CVE-2020-29457?: CVE-2020-29457 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-29457 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29457?: CVE-2020-29457 affects Opcfoundation Ua-.netstandard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29457?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-29457 published?: CVE-2020-29457 was published on 2021-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opcfoundation:ua-.netstandard:*:*:*:*:*:*:*:*

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