CVE-2016-5311

mediumpriority · track · 31EPSS 0.007 · 54 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.71% (54th) EPSS

CVSS 6.9 · medium

Is it mine?

11 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

A Privilege Escalation vulnerability exists in Symantec Norton Antivirus, Norton AntiVirus with Backup, Norton Security, Norton Security with Backup, Norton Internet Security, Norton 360, Endpoint Protection Small Business Edition Cloud, and Endpoint Protection Cloud Client due to a DLL-preloading without path restrictions, which could let a local malicious user obtain system privileges.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.06.9mediumAV:L/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.4 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-427USprimary

affected products (11)

Products and version ranges known to be affected.

Symantec Endpoint Protection Small Business Edition Cloud, and Endpoint Protection Cloud Client≤ before 22.8.0.50enisa_euvdEU
Symantec Norton Antivirus, Norton AntiVirus with Backup, Norton Security, Norton Security with Backup, Norton Internet Security, Norton 360≤ before 22.7enisa_euvdEU
symantec endpoint protection< 22.8.0.50nvdUScpe:2.3:a:symantec:endpoint_protection:*:*:*:*:*:*:*:*
symantec endpoint protection cloud< 22.8.0.50nvdUScpe:2.3:a:symantec:endpoint_protection_cloud:*:*:*:*:*:*:*:*
symantec norton 360< 22.7nvdUScpe:2.3:a:symantec:norton_360:*:*:*:*:*:*:*:*
symantec norton antivirus< 22.7nvdUScpe:2.3:a:symantec:norton_antivirus:*:*:*:*:*:*:*:*
symantec norton antivirus with backup< 22.7nvdUScpe:2.3:a:symantec:norton_antivirus_with_backup:*:*:*:*:*:*:*:*
symantec norton family< 22.7nvdUScpe:2.3:a:symantec:norton_family:*:*:*:*:*:*:*:*
symantec norton internet security< 22.7nvdUScpe:2.3:a:symantec:norton_internet_security:*:*:*:*:*:*:*:*
symantec norton security< 22.7nvdUScpe:2.3:a:symantec:norton_security:*:*:*:*:*:*:*:*
symantec norton security with backup< 22.7nvdUScpe:2.3:a:symantec:norton_security_with_backup:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-01-09modified 2026-06-17

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+1382 more

references (16)

External citations — patches, advisories, analysis.

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