CVE-2018-12243

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-19 · updated 2026-06-17
Weakness: CWE-611

Description

The Symantec Messaging Gateway product prior to 10.6.6 may be susceptible to a XML external entity (XXE) exploit, which is a type of issue where XML input containing a reference to an external entity is processed by a weakly configured XML parser. The attack uses file URI schemes or relative paths in the system identifier to access files that should not normally be accessible.

Affected products

Symantec Messaging Gateway: before 10.6.6 — fixed in 10.6.6

How to fix

Upgrade to a fixed version: Symantec Messaging Gateway 10.6.6. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/105330
https://support.symantec.com/en_US/article.SYMSA1461.html
http://www.securityfocus.com/bid/105330
https://support.symantec.com/en_US/article.SYMSA1461.html

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