HOMEVULNERABILITIESCVE-2018-18366
MEDIUM

CVE-2018-18366

CWE-908Published: April 25, 2019· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

Symantec Norton Security prior to 22.16.3, SEP (Windows client) prior to and including 12.1 RU6 MP9, and prior to 14.2 RU1, SEP SBE prior to Cloud Agent 3.00.31.2817, NIS-22.15.2.22, SEP-12.1.7484.7002 and SEP Cloud prior to 22.16.3 may be susceptible to a kernel memory disclosure, which is a type of issue where a specially crafted IRP request can cause the driver to return uninitialized memory.

NVD Source

Technical Analysis

CVE-2018-18366 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeChanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected Vendors & Products

symantec4 product(s)
endpoint protectionendpoint protection cloudendpoint protection cloud agentnorton security
Source: NVD CPE · 11 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityfocus.com/bid/107994
ADVISORYhttps://support.symantec.com/en_US/article.SYMSA1479.html
ADVISORYhttp://www.securityfocus.com/bid/107994
ADVISORYhttps://support.symantec.com/en_US/article.SYMSA1479.html

All References (4)

→
http://www.securityfocus.com/bid/107994Third Party Advisory · VDB Entry
→
https://support.symantec.com/en_US/article.SYMSA1479.htmlVendor Advisory
→
http://www.securityfocus.com/bid/107994Third Party Advisory · VDB Entry
→
https://support.symantec.com/en_US/article.SYMSA1479.htmlVendor Advisory

Quick Facts

CVE IDCVE-2018-18366
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-908
CISA KEVNo
Affected1 vendor(s)
PublishedApr 25, 2019

Related CVEs (CWE-908)

CVE-2022-26437
9.8
CVE-2025-1942
9.8
CVE-2015-8390
9.8
CVE-2021-29937
9.8
CVE-2021-28035
9.8
CVE-2026-56190
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-18366 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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