CVE-2018-18519: BestXsoftware Best Free Keylogger before 6.0.0 allows local users to gain privileges via a Trojan horse "%PROG

Q: How do I fix CVE-2018-18519?

best free keylogger: upgrade to newer than 5.2.9. Exact commands for each OS are on this page.

Q: Is CVE-2018-18519 being exploited?

CVE-2018-18519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-18519 affect?

CVE-2018-18519 affects best free keylogger. Severity is high (CVSS 7.8). BestXsoftware Best Free Keylogger before 6.0.0 allows local users to gain privileges via a Trojan horse "%PROGRAMFILES%\BFK 5.2.9\syscrb.exe" file because of insecure permissions for the BUILTIN\Users group.

This month

HIGH 7.8UPGRADE

CVE-2018-18519 is a high-severity flaw (CVSS 7.8) affecting best free keylogger. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

BestXsoftware Best Free Keylogger before 6.0.0 allows local users to gain privileges via a Trojan horse "%PROGRAMFILES%\BFK 5.2.9\syscrb.exe" file because of insecure permissions for the BUILTIN\Users group.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-426
Published	2018-11-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bestxsoftware

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-11-19 08:29 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

bestxsoftware best free keylogger UPGRADE

Affected: <= 5.2.9

Fixed in: newer than 5.2.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy best-free-keylogger || rpm -q best-free-keylogger || best-free-keylogger --version

2. UPGRADE to newer than 5.2.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade best-free-keylogger

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade best-free-keylogger

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-18519?

best free keylogger: upgrade to newer than 5.2.9. Exact commands for each OS are on this page.

Is CVE-2018-18519 being exploited?

CVE-2018-18519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-18519 affect?

CVE-2018-18519 affects best free keylogger. Severity is high (CVSS 7.8). BestXsoftware Best Free Keylogger before 6.0.0 allows local users to gain privileges via a Trojan horse "%PROGRAMFILES%\BFK 5.2.9\syscrb.exe" file because of insecure permissions for the BUILTIN\Users group.

How urgent is CVE-2018-18519?

Priority 41/100. High severity

References

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