CVE-2018-18366
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…
- Published
- Updated
- Reserved
- Assigned by
- symantec
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.
Timeline
ID reserved
By symantec
- 6 months later
· 6 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.39% · top 67% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- Kernel memory disclosure
- CWE-908 (opens in a new tab)All about CWE-908 and its CVEs
Affected products
Symantec Corporation · Norton Security
- affected Prior to 22.16.3
Symantec Corporation · SEP (Windows client)
- affected Prior to and including 12.1 RU6 MP9
- affected Prior to 14.2 RU1
Symantec Corporation · SEP SBE
- affected Prior to Cloud Agent 3.00.31.2817
- affected NIS-22.15.2.22
- affected SEP-12.1.7484.7002
Symantec Corporation · SEP Cloud
- affected Prior to 22.16.3
References (2)
- https://support.symantec.com/en_US/article.SYMSA1479.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 107994 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-18366)Record last updated .