How severe is CVE-2021-30651?

CVE-2021-30651 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-30651 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30651?

CVE-2021-30651 affects Broadcom Symantec Messaging Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30651?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-30651 published?

CVE-2021-30651 was published on 2022-06-24 and last updated on 2026-06-17.

CVE-2021-30651

CVE-2021-30651 is a medium-severity vulnerability in Broadcom Symantec Messaging Gateway with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 4.0
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Broadcom Symantec Messaging Gateway
Published: 2022-06-24
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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.
How severe is CVE-2021-30651?: CVE-2021-30651 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-30651 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30651?: CVE-2021-30651 affects Broadcom Symantec Messaging Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30651?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-30651 published?: CVE-2021-30651 was published on 2022-06-24 and last updated on 2026-06-17.

References

https://support.broadcom.com/external/content/SecurityAdvisories/0/20652

Affected products (1)

cpe:2.3:a:broadcom:symantec_messaging_gateway:*:*:*:*:*:*:*:*

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