What is the CVSS score of CVE-2020-3923?

CVE-2020-3923 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: 1.7%.

Tat 77104G1 Firmware CVE-2020-3923

CRITICAL

Improper Authentication (CWE-287)

2020-02-27 twcert@cert.org.tw

Authentication Bypass Tat 77104G1 Firmware Tat 70432N Firmware Tat 71416G1 Firmware Tat 71832G1 Firmware Tat 76104G3 Firmware Tat 76108G3 Firmware Tat 76116G3 Firmware Tat 76132G3 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

Feb 27, 2020 - 04:15 nvd

CRITICAL 9.8

DescriptionNVD

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.

AnalysisAI

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. 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 Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system. Affected products include: Tonnet Tat-77104G1 Firmware, Tonnet Tat-70432N Firmware, Tonnet Tat-71416G1 Firmware, Tonnet Tat-71832G1 Firmware, Tonnet Tat-76104G3 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.