What is CVE-2019-18644?

CVE-2019-18644 is a medium-severity vulnerability in Totaldefense Anti-Virus, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2019-10-31.

How severe is CVE-2019-18644?

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

Vulnerability in Totaldefense Anti-Virus

CVE-2019-18644

The malware scan function in Total Defense Anti-virus 11.5.2.28 is vulnerable to a TOCTOU bug; consequently, symbolic link attacks allow privileged files to be deleted.

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

Published 2019-10-31 · 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 (44.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% 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

Totaldefense Anti-Virus — versions 11.5.2.28

Weakness classification (CWE)

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

References

github.com/NtRaiseHardError/Antimalware-Research/blob/master/Total Defense/Priv… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-18644?: CVE-2019-18644 is a medium-severity vulnerability in Totaldefense Anti-Virus, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.9/10. Published 2019-10-31.
How severe is CVE-2019-18644?: Medium severity. CVSS v3 base score is 5.9 out of 10.