What is CVE-2019-20000?

CVE-2019-20000 is a medium-severity vulnerability in Bullguard Premium Protection, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2019-12-26.

How severe is CVE-2019-20000?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Bullguard Premium Protection

CVE-2019-20000

The malware scan function in BullGuard Premium Protection 20.0.371.8 has a TOCTOU issue that enables a symbolic link attack, allowing privileged files to be deleted.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2019-12-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.9th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Bullguard Premium Protection — versions 20.0.371.8

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

github.com/NtRaiseHardError/Antimalware-Research/blob/master/BullGuard/Privileg… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20000?: CVE-2019-20000 is a medium-severity vulnerability in Bullguard Premium Protection, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2019-12-26.
How severe is CVE-2019-20000?: Medium severity. CVSS v3 base score is 5.9 out of 10.