Is CVE-2018-5349 actively exploited?

No active exploitation of CVE-2018-5349 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-5349 be exploited remotely?

No. CVE-2018-5349 requires local access to exploit.

What is the CVSS score of CVE-2018-5349?

CVE-2018-5349 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2018-5349

HIGH

CVE-2018-5349

CWE-732Published: March 22, 2018· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

A vulnerability has been found in Heimdal PRO v2.2.190, but it is most likely also present in Heimdal FREE and Heimdal CORP. Faulty permissions on the directory "C:\ProgramData\Heimdal Security\Heimdal Agent" allow BUILTIN\Users to write new files to the directory. On startup, the process Heimdal.MonitorServices.exe running as SYSTEM will attempt to load version.dll from this directory. Placing a malicious version.dll in this directory will result in privilege escalation. NOTE: any affected Heimdal products are completely unrelated to the Heimdal vendor of a Kerberos 5 product on the h5l.org web site.

NVD Source

Technical Analysis

CVE-2018-5349 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), availability disruption (denial of service), with a CVSS base score of 7.8.