CVE-2018-12239

Severity: medium (CVSS 6.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-11-29 · updated 2026-06-17

Description

Norton prior to 22.15; Symantec Endpoint Protection (SEP) prior to 12.1.7454.7000 & 14.2; Symantec Endpoint Protection Small Business Edition (SEP SBE) prior to NIS-22.15.1.8 & SEP-12.1.7454.7000; and Symantec Endpoint Protection Cloud (SEP Cloud) prior to 22.15.1 may be susceptible to an AV bypass issue, which is a type of exploit that works to circumvent one of the virus detection engines to avoid a specific type of virus protection. One of the antivirus engines depends on a signature pattern from a database to identify malicious files and viruses; the antivirus bypass exploit looks to alter the file being scanned so it is not detected.

Affected products

Symantec Endpoint Protection: from 11.0 before 12.1.7454.7000; from 14.0 through 14.2 — fixed in 12.1.7454.7000
Symantec Endpoint Protection Cloud: before 22.15.1 — fixed in 22.15.1
Symantec Norton Antivirus: before 22.15 — fixed in 22.15

How to fix

Upgrade to a fixed version: Symantec Endpoint Protection 12.1.7454.7000; Symantec Endpoint Protection Cloud 22.15.1; Symantec Norton Antivirus 22.15. Check the vendor advisory for mitigations.

References

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