CVE-2018-12243 json
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…
published 2018-09-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4221
- cvss
- 8.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- symantec messaging_gateway 10.6.6
Exploit prediction
0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 8.8 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 5.8 | AV:A/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Symantec Corporation Symantec Messaging Gateway
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
support.symantec.com
/en_US/article.SYMSA1461.html
mitigation, vendor-advisory
-
securityfocus.com
/bid/105330
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-12243
- NVD CVE-2018-12243
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.