How severe is CVE-2017-6327?

CVE-2017-6327 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-6327 being actively exploited?

Yes. CVE-2017-6327 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-6327?

CVE-2017-6327 affects Symantec Message Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-6327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2017-6327 have an EU (EUVD) identifier?

Yes. CVE-2017-6327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-15388. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2017-6327 published?

CVE-2017-6327 was published on 2017-08-11 and last updated on 2026-06-17.

CVE-2017-6327

CVE-2017-6327 is a high-severity vulnerability in Symantec Message Gateway with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 35% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2017-15388
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-77
Affected product: Symantec Message Gateway
Published: 2017-08-11
Last modified: 2026-06-17

Description

The Symantec Messaging Gateway before 10.6.3-267 can encounter an issue of remote code execution, which describes a situation whereby an individual may obtain the ability to execute commands remotely on a target machine or in a target process. In this type of occurrence, after gaining access to the system, the attacker may attempt to elevate their privileges.

Frequently asked questions

What is CVE-2017-6327?: The Symantec Messaging Gateway before 10.6.3-267 can encounter an issue of remote code execution, which describes a situation whereby an individual may obtain the ability to execute commands remotely on a target machine or in a target process. In this type of occurrence, after gaining access to the system, the attacker may attempt to elevate their privileges.
How severe is CVE-2017-6327?: CVE-2017-6327 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-6327 being actively exploited?: Yes. CVE-2017-6327 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2017-6327?: CVE-2017-6327 affects Symantec Message Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-6327?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2017-6327 have an EU (EUVD) identifier?: Yes. CVE-2017-6327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-15388. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2017-6327 published?: CVE-2017-6327 was published on 2017-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:symantec:message_gateway:*:*:*:*:*:*:*:*

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