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CVE-2018-12239

23
FAUCET Score

CVE-2018-12239 describes an antivirus bypass vulnerability affecting various Symantec and Norton products, including Symantec Endpoint Protection (SEP), SEP Small Business Edition (SEP SBE), SEP Cloud, and Norton Antivirus prior to specified versions. This flaw allows attackers to alter malicious files to evade detection by signature-based antivirus engines. Rated 6.8 MEDIUM, the vulnerability has a physical attack vector (AV:P) and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.0, < 12.1.7454.7000CPE matchmatch criteria
cpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:*:*:*
>= 14.0, <= 14.2CPE matchmatch criteria
cpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:*:*:*
< 22.15.1CPE matchmatch criteria
cpe:2.3:a:symantec:endpoint_protection_cloud:*:*:*:*:*:*:*:*
< 22.15CPE matchmatch criteria
cpe:2.3:a:symantec:norton_antivirus:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.8MEDIUM

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
40.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 79th percentile among its peer group of 1,532 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.symantec.com / content/unifiedweb/en_US/article.SYMSA1468.html
Vendor Advisory
securityfocus.com / bid/105918
Third Party AdvisoryVDB Entry