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No exploitation reportedFix available

CVE-2021-30648

No exploitation reported by the sources we read.

  • Published2021-06-30
  • Fixed in7.3.3.3 · 7.2.7.2 · 6.7.5.12 · 6.6.5.19 · 6.5.10.16
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-06-3011:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-30648?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-30648?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Broadcom symantec proxysg
BranchAffectedFixed in
7.3≥ 7.3, < 7.3.3.37.3.3.3
7.2≥ 7.2, < 7.2.7.27.2.7.2
6.7≥ 6.7, < 6.7.5.126.7.5.12
6.6≥ 6.6, < 6.6.5.196.6.5.19
6.5≥ 6.5, < 6.5.10.166.5.10.16
Broadcom symantec advanced secure gateway 500-10 firmwareversion to verify
BranchAffectedFixed in
7.3≥ 7.3, < 7.3.3.37.3.3.3
7.2≥ 7.2, < 7.2.7.27.2.7.2
6.7≥ 6.7.5.0, < 6.7.5.126.7.5.12
6.x≥ 6.6, < 6.7.4.176.7.4.17
Broadcom symantec advanced secure gateway s200-30 firmwareversion to verify
BranchAffectedFixed in
7.3≥ 7.3, < 7.3.3.37.3.3.3
7.2≥ 7.2, < 7.2.7.27.2.7.2
6.7≥ 6.7.5.0, < 6.7.5.126.7.5.12
6.x≥ 6.6, < 6.7.4.176.7.4.17

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Broadcom symantec proxysg to 7.3.3.3 · 7.2.7.2 · 6.7.5.12 · 6.6.5.19 · 6.5.10.16

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.09read 2026-10-23
  • NVDweakness (CWE)CWE-287read 2026-10-23
  • FIRST EPSSEPSS score1.4 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-06-30
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is 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.

Is CVE-2021-30648 actively exploited?

Active exploitation of CVE-2021-30648 has not been confirmed. Its EPSS score was 1.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

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

CVE-2021-30648 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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