What is the CVSS score of CVE-2021-35978?

CVE-2021-35978 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 3.6%.

Transport Dr64 Firmware CVE-2021-35978

CRITICAL

Command Injection (CWE-77)

2021-12-10 cve@mitre.org

RCE Command Injection Transport Dr64 Firmware Transport Sr44 Firmware Transport Vc74 Firmware Transport Wr11 Firmware Transport Wr11 Xt Firmware Transport Wr21 Firmware Transport Wr31 Firmware Transport Wr41 Firmware Transport Wr44 Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Dec 10, 2021 - 13:15 nvd

CRITICAL 9.8

DescriptionNVD

An issue was discovered in Digi TransPort DR64, SR44 VC74, and WR. The ZING protocol allows arbitrary remote command execution with SUPER privileges. This allows an attacker (with knowledge of the protocol) to execute arbitrary code on the controller including overwriting firmware, adding/removing users, disabling the internal firewall, etc.

AnalysisAI

An issue was discovered in Digi TransPort DR64, SR44 VC74, and WR. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Command Injection (CWE-77), which allows attackers to inject arbitrary commands into system command execution. An issue was discovered in Digi TransPort DR64, SR44 VC74, and WR. The ZING protocol allows arbitrary remote command execution with SUPER privileges. This allows an attacker (with knowledge of the protocol) to execute arbitrary code on the controller including overwriting firmware, adding/removing users, disabling the internal firewall, etc. Affected products include: Digi Transport Dr64 Firmware, Digi Transport Sr44 Firmware, Digi Transport Vc74 Firmware, Digi Transport Wr11 Firmware, Digi Transport Wr11 Xt Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use parameterized APIs, avoid shell execution, validate input with strict allowlists.