CVE-2021-42794

Name: CVE-2021-42794
Creator: NVD / NIST
Published: 2023-12-16T01:15:07.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-42794 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Aveva	Edge	< 2020
Aveva	Edge	2020

References

https://www.aveva.com/en/products/edge/Product
https://www.cisa.gov/news-events/ics-advisories/icsa-22-326-01Third Party Advisory, US Government Resource
https://www.exploit-db.com/docs/english/17254-connection-string-parameter-pollution-attacks.pdfExploit, Third Party Advisory, VDB Entry
https://www.aveva.com/en/products/edge/Product
https://www.cisa.gov/news-events/ics-advisories/icsa-22-326-01Third Party Advisory, US Government Resource
https://www.exploit-db.com/docs/english/17254-connection-string-parameter-pollution-attacks.pdfExploit, Third Party Advisory, VDB Entry

Timeline

Published: Dec 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42794?

How severe is CVE-2021-42794?

CVE-2021-42794 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42794?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42794?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST