How severe is CVE-2021-42794?

CVE-2021-42794 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-42794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42794?

CVE-2021-42794 primarily affects Aveva Edge. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-42794?

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

When was CVE-2021-42794 published?

CVE-2021-42794 was published on 2023-12-16 and last updated on 2026-06-17.

CVE-2021-42794

CVE-2021-42794 is a medium-severity vulnerability in Aveva Edge with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Aveva Edge
Published: 2023-12-16
Last modified: 2026-06-17

Description

An issue was discovered in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior. The application allows a client to provide a malicious connection string that could allow an adversary to port scan the LAN, depending on the hosts' responses.

Frequently asked questions

What is CVE-2021-42794?: An issue was discovered in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior. The application allows a client to provide a malicious connection string that could allow an adversary to port scan the LAN, depending on the hosts' responses.
How severe is CVE-2021-42794?: CVE-2021-42794 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-42794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42794?: CVE-2021-42794 primarily affects Aveva Edge. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-42794?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42794 published?: CVE-2021-42794 was published on 2023-12-16 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:aveva:edge:*:*:*:*:*:*:*:*
cpe:2.3:a:aveva:edge:2020:-:*:*:*:*:*:*
cpe:2.3:a:aveva:edge:2020:r2:-:*:*:*:*:*
cpe:2.3:a:aveva:edge:2020:r2:sp1:*:*:*:*:*

More vulnerabilities in Aveva Edge

CVE-2021-42796 — Critical (CVSS 9.8): An issue was discovered in ExecuteCommand() in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior that…
CVE-2018-17916 — Critical (CVSS 9.8): InduSoft Web Studio versions prior to 8.1 SP2, and InTouch Edge HMI (formerly InTouch Machine Edition) versions prior…
CVE-2018-17914 — Critical (CVSS 9.8): InduSoft Web Studio versions prior to 8.1 SP2, and InTouch Edge HMI (formerly InTouch Machine Edition) versions prior…
CVE-2023-33873 — High (CVSS 7.8): This privilege escalation vulnerability, if exploited, cloud allow a local OS-authenticated user with standard…
CVE-2021-42797 — High (CVSS 7.5): Path traversal vulnerability in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior allows an…
CVE-2023-34982 — Medium (CVSS 5.5): This external control vulnerability, if exploited, could allow a local OS-authenticated user with standard privileges…

All CVEs affecting Aveva Edge →