What’s Vulnerable › Vulnerabilities

CVE-2021-42794

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-12-16 · updated 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.

Affected products

• AVEVA Edge: before 2020; 2020, 2020-r2 — fixed in 2020

How to fix

Upgrade to a fixed version: AVEVA Edge 2020. Check the vendor advisory for mitigations.

References

• https://www.aveva.com/en/products/edge/
• https://www.cisa.gov/news-events/ics-advisories/icsa-22-326-01
• https://www.exploit-db.com/docs/english/17254-connection-string-parameter-pollution-attacks.pdf
• https://www.aveva.com/en/products/edge/
• https://www.cisa.gov/news-events/ics-advisories/icsa-22-326-01
• https://www.exploit-db.com/docs/english/17254-connection-string-parameter-pollution-attacks.pdf

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