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Vulnerability record · CVE-2021-30648 · published 30 June 2021

CVE-2021-30648: Broadcom symantec proxysg improper authentication vulnerability

Broadcom · Symantec Proxysg

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.

9.8 CVSS 3.1 Critical EPSS 1.4% · top 27.8% CWE-287 · Improper authentication
9.8CVSS 3.1 base score, v2 9.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.broadcom.com/security-advisory/content/security-advisories/0/SYMSA18331 Vendor Advisory
https://support.broadcom.com/security-advisory/content/security-advisories/0/SYMSA18331 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-30648), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.