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CVE-2021-42794

18
FAUCET Score

CVE-2021-42794 is a medium-severity vulnerability affecting AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior. It allows an unauthenticated attacker to provide a malicious connection string, enabling them to conduct port scans of the local area network. While the CVSS score is 5.3, indicating low impact (confidentiality only), there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2020CPE matchmatch criteria
cpe:2.3:a:aveva:edge:*:*:*:*:*:*:*:*
2020CPE matchmatch criteria
cpe:2.3:a:aveva:edge:2020:-:*:*:*:*:*:*
2020CPE matchmatch criteria
cpe:2.3:a:aveva:edge:2020:r2:-:*:*:*:*:*
2020CPE matchmatch criteria
cpe:2.3:a:aveva:edge:2020:r2:sp1:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
64.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 43rd percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

aveva.com / en/products/edge
Product
cisa.gov / news-events/ics-advisories/icsa-22-326-01
Third Party AdvisoryUS Government Resource
exploit-db.com / docs/english/17254-connection-string-parameter-pollution-attacks.pdf
ExploitThird Party AdvisoryVDB Entry