What is the CVSS score of CVE-2021-30648?

CVE-2021-30648 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: 1.4%.

Symantec Proxysg CVE-2021-30648

CRITICAL

Improper Authentication (CWE-287)

2021-06-30 secure@symantec.com

Authentication Bypass Symantec Proxysg Symantec Advanced Secure Gateway S200 30 Firmware Symantec Advanced Secure Gateway S200 40 Firmware Symantec Advanced Secure Gateway S400 20 Firmware Symantec Advanced Secure Gateway S400 30 Firmware Symantec Advanced Secure Gateway S400 40 Firmware Symantec Advanced Secure Gateway 500 10 Firmware Symantec Advanced Secure Gateway S500 20 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

Jun 30, 2021 - 11:15 nvd

CRITICAL 9.8

DescriptionNVD

The Symantec Advanced Secure Gateway (ASG) and ProxySG web management consoles are susceptible to an authentication bypass vulnerability. An unauthenticated attacker can execute arbitrary CLI commands, view/modify the appliance configuration and policy, and shutdown/restart the appliance.

AnalysisAI

The Symantec Advanced Secure Gateway (ASG) and ProxySG web management consoles are susceptible to an authentication bypass vulnerability. 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. The Symantec Advanced Secure Gateway (ASG) and ProxySG web management consoles are susceptible to an authentication bypass vulnerability. An unauthenticated attacker can execute arbitrary CLI commands, view/modify the appliance configuration and policy, and shutdown/restart the appliance. Affected products include: Broadcom Symantec Proxysg, Broadcom Symantec Advanced Secure Gateway S200-30 Firmware, Broadcom Symantec Advanced Secure Gateway S200-40 Firmware, Broadcom Symantec Advanced Secure Gateway S400-20 Firmware, Broadcom Symantec Advanced Secure Gateway S400-30 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.