Is CVE-2017-6327 being actively exploited?

Yes. CVE-2017-6327 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on November 3, 2021.

What is the CVSS score for CVE-2017-6327?

CVE-2017-6327 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2017-6327

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 35.9%EU EUVD: exploited

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.

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-77
EPSS score: 35.9% (98th percentile)
In CISA KEV: Yes, added November 3, 2021
In EU EUVD: Yes (EUVD-2017-15388)
Published: August 11, 2017
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Symantec Messaging Gateway Remote Code Execution Vulnerability

Added to the KEV catalog on November 3, 2021; federal remediation due May 3, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-15388 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

symantec / message gateway

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

SYMANTEC MESSAGING GATEWAY v10.6.1-4 - Symantec Corporation - Common Criteria Number: 2016/101 - archived

References

http://seclists.org/fulldisclosure/2017/Aug/28(Mailing List, Third Party Advisory)
http://www.securityfocus.com/bid/100135(Broken Link, Third Party Advisory, VDB Entry)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6327(US Government Resource)
https://www.exploit-db.com/exploits/42519/(Third Party Advisory, VDB Entry)
https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20170810_00(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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