HOME VULNERABILITIESCVE-2016-6591

HIGH

CVE-2016-6591

CWE-863Published: January 8, 2020· Updated: Jun 17, 2026

7.1

CVSS v3.1

Official Description

A security bypass vulnerability exists in Symantec Norton App Lock 1.0.3.186 and earlier if application pinning is enabled, which could let a local malicious user bypass security restrictions.

Technical Analysis

CVE-2016-6591 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), full integrity compromise (data manipulation), with a CVSS base score of 7.1.

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 VectorPhysical

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected Vendors & Products

symantec1 product(s)

norton app lock

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

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/94343

ADVISORYhttps://support.symantec.com/us/en/article.symsa1386.html

ADVISORYhttp://www.securityfocus.com/bid/94343

ADVISORYhttps://support.symantec.com/us/en/article.symsa1386.html

All References (4)

→

http://www.securityfocus.com/bid/94343Third Party Advisory · VDB Entry

→

https://support.symantec.com/us/en/article.symsa1386.htmlVendor Advisory

→

http://www.securityfocus.com/bid/94343Third Party Advisory · VDB Entry

→

https://support.symantec.com/us/en/article.symsa1386.htmlVendor Advisory

Quick Facts

CVE IDCVE-2016-6591

CVSS Score7.1 / 10

SeverityHIGH

WeaknessCWE-863

CISA KEVNo

Affected1 vendor(s)

PublishedJan 8, 2020

Related CVEs (CWE-863)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2016-6591 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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