CVE-2021-30648

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.

Published: 2021-06-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30648 is rated Moderate Risk (60.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.49%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-30648

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.95% 0.49% -0.46%
2 2025-03-29 0.49% 0.95% +0.46%
3 2025-03-17 — 0.49% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30648

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 8.5 [email protected]

Weakness enumeration for CVE-2021-30648

Affected software / configurations for CVE-2021-30648

Vendor Product Version Raw CPE
broadcom symantec_proxysg >= 6.5, < 6.5.10.16 cpe:2.3:a:broadcom:symantec_proxysg:*:*:*:*:*:*:*:*
broadcom symantec_proxysg >= 6.6, < 6.6.5.19 cpe:2.3:a:broadcom:symantec_proxysg:*:*:*:*:*:*:*:*
broadcom symantec_proxysg >= 6.7, < 6.7.5.12 cpe:2.3:a:broadcom:symantec_proxysg:*:*:*:*:*:*:*:*
broadcom symantec_proxysg >= 7.2, < 7.2.7.2 cpe:2.3:a:broadcom:symantec_proxysg:*:*:*:*:*:*:*:*
broadcom symantec_proxysg >= 7.3, < 7.3.3.3 cpe:2.3:a:broadcom:symantec_proxysg:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-30_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-30_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-30_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-30_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-40_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-40_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-40_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s200-40_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s200-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-20_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-20_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-20_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-20_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-30_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-30_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-30_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-30_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-30_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-40_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-40_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-40_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s400-40_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s400-40_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_500-10_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_500-10_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_500-10_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_500-10_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_500-10_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_500-10_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_500-10_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_500-10_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s500-20_firmware >= 6.6, < 6.7.4.17 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s500-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s500-20_firmware >= 6.7.5.0, < 6.7.5.12 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s500-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s500-20_firmware >= 7.2, < 7.2.7.2 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s500-20_firmware:*:*:*:*:*:*:*:*
broadcom symantec_advanced_secure_gateway_s500-20_firmware >= 7.3, < 7.3.3.3 cpe:2.3:o:broadcom:symantec_advanced_secure_gateway_s500-20_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-30648

cvelogic Threat Intelligence