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CVE-2021-35978

30
FAUCET Score

CVE-2021-35978 describes a critical arbitrary remote command execution vulnerability with SUPER privileges in Digi TransPort DR64, SR44 VC74, and WR devices, stemming from an issue in the ZING protocol. With a CVSS score of 9.8, this flaw allows unauthenticated attackers to execute arbitrary code, potentially leading to firmware overwrites, user manipulation, or firewall disabling. While no public exploits or active exploitation have been observed, and community discussion is minimal, the high FAUCET Risk Score of 86/100 underscores its significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.4.9CPE matchmatch criteria
cpe:2.3:o:digi:transport_dr64_firmware:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:digi:transport_sr44_firmware:*:*:*:*:*:*:*:*
<= 5.2.4.9CPE matchmatch criteria
cpe:2.3:o:digi:transport_vc74_firmware:*:*:*:*:*:*:*:*
<= 8.2.1.3CPE matchmatch criteria
cpe:2.3:o:digi:transport_wr11_firmware:*:*:*:*:*:*:*:*
<= 8.2.1.3CPE matchmatch criteria
cpe:2.3:o:digi:transport_wr11_xt_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.56%
Probability of exploitation in next 30 days
EPSS Percentile
88.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0356 is in the 80th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

digi.com
Vendor Advisory
raw.githubusercontent.com / reidmefirst/vuln-disclosure/main/2021-04.txt
Third Party Advisory