What is CVE-2021-32198?

CVE-2021-32198 is a critical-severity vulnerability in Emtec Zoc. CVSS score: 9.8/10. Published 2021-06-06.

How severe is CVE-2021-32198?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Emtec Zoc

CVE-2021-32198

EmTec ZOC through 8.02.4 allows remote servers to cause a denial of service (Windows GUI hang) by telling the ZOC window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. In other words, it does not implement a usleep or similar delay upon processing a title change.

Published 2021-06-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (65.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Emtec Zoc

References

www.emtec.com/downloads/zoc/zoc_changes.txt (Release Notes, Vendor Advisory)
pastebin.com/0xhrDvW0 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-32198?: CVE-2021-32198 is a critical-severity vulnerability in Emtec Zoc. CVSS score: 9.8/10. Published 2021-06-06.
How severe is CVE-2021-32198?: Critical severity. CVSS v3 base score is 9.8 out of 10.