How severe is CVE-2021-42796?

CVE-2021-42796 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42796 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42796?

CVE-2021-42796 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-2021-42796?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-42796 published?

CVE-2021-42796 was published on 2023-12-16 and last updated on 2026-06-17.

CVE-2021-42796

CVE-2021-42796 is a critical-severity vulnerability in Aveva Edge with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Aveva Edge
Published: 2023-12-16
Last modified: 2026-06-17

Description

An issue was discovered in ExecuteCommand() in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior that allows unauthenticated arbitrary commands to be executed.

Frequently asked questions

What is CVE-2021-42796?: An issue was discovered in ExecuteCommand() in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior that allows unauthenticated arbitrary commands to be executed.
How severe is CVE-2021-42796?: CVE-2021-42796 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42796 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42796?: CVE-2021-42796 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-2021-42796?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-42796 published?: CVE-2021-42796 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:*:*:*:*:*

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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…
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CVE-2021-42797 — High (CVSS 7.5): Path traversal vulnerability in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior allows an…
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CVE-2021-42794 — Medium (CVSS 5.3): An issue was discovered in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior. The application allows a…

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