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CVE-2021-35979

25
FAUCET Score

CVE-2021-35979 is a high-severity vulnerability affecting Digi RealPort versions through 4.8.488.0, where the "encrypted" mode is susceptible to man-in-the-middle attacks due to a lack of authentication. This flaw allows an unauthenticated attacker to achieve high impact on confidentiality, integrity, and availability with high attack complexity, as indicated by its CVSS score of 8.1. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.9-40CPE matchmatch criteria
cpe:2.3:a:digi:realport:*:*:*:*:*:linux:*:*
<= 4.8.488.0CPE matchmatch criteria
cpe:2.3:a:digi:realport:*:*:*:*:*:windows:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:digi:connectport_ts_8\/16_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:digi:connectport_lts_8\/16\/32_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:digi:passport_integrated_console_server_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 22nd percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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

raw.githubusercontent.com / reidmefirst/vuln-disclosure/main/2021-02.txt
Third Party Advisory