How severe is CVE-2021-30651?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Broadcom Symantec Messaging Gateway

CVE-2021-30651

A malicious authenticated SMG administrator user can obtain passwords for external LDAP/Active Directory servers that they might not otherwise be authorized to access.

Published 2022-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Broadcom Symantec Messaging Gateway
Symantec Messaging Gateway (Smg) — versions 10.7

References

support.broadcom.com/external/content/SecurityAdvisories/0/20652 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-30651?: CVE-2021-30651 is a medium-severity vulnerability in Broadcom Symantec Messaging Gateway. CVSS score: 4.9/10. Published 2022-06-24.
How severe is CVE-2021-30651?: Medium severity. CVSS v3 base score is 4.9 out of 10.