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CVE-2020-3442

16
FAUCET Score

CVE-2020-3442 describes an insecure communication vulnerability in DuoConnect, affecting Duo's DuoConnect client. When the '-relay' argument is configured with "http://", authentication tokens can be transmitted over an unencrypted connection, making them susceptible to network sniffing. This medium-severity vulnerability (CVSS 5.7) has an adjacent attack vector and low attack complexity, potentially leading to high confidentiality impact if an attacker intercepts tokens. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.1CPE matchmatch criteria
cpe:2.3:a:duo:duoconnect:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.15%
Probability of exploitation in next 30 days
EPSS Percentile
4.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0015 is in the 11th percentile among its peer group of 126 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

duo.com / labs/psa/duo-psa-2020-003
PatchVendor Advisory