CVE-2021-42794 json
An issue was discovered in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior.
published 2023-12-16 2 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29750
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- aveva edge 2020
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-22-326-01 updated cvss 5.3
AVEVA Edge
-
AVEVA Software, LLC AVEVA Edge 2020 R2 SP1, R2 SP1 w/ HF 2020.2.00.40, <= R2 (formerly known as InduSoft Web Studio)affected: mitigation “AVEVA recommends organizations evaluate the impact of these vulnerabilities based on operational environment, architecture, and product implementations.” softwaresupportsp.aveva.com
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Exploit prediction
1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- exploit-db.com https://www.exploit-db.com/docs/english/17254-connection-string-parameter-pollution-attacks.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References
-
exploit-db.com
/docs/english/17254-connection-string-parameter-pollution-attacks.pdf
exploit, third-party-advisory, vdb-entry
-
aveva.com
/en/products/edge/
product
-
cisa.gov
/news-events/ics-advisories/icsa-22-326-01
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2021-42794
- NVD CVE-2021-42794
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.