CVE-2016-5311
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.71% probability · 53th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-427
- Affected
- symantec/endpoint protection · symantec/endpoint protection cloud · symantec/norton 360 · symantec/norton antivirus · symantec/norton antivirus with backup · symantec/norton family · symantec/norton internet security · symantec/norton security · symantec/norton security with backup
- Source
- secure@symantec.com
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/94295Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037323Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037324Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037325Third Party Advisory, VDB Entry
- https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20161117_00Vendor Advisory
- http://www.securityfocus.com/bid/94295Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037323Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037324Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037325Third Party Advisory, VDB Entry
- https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20161117_00Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.