CVE-2021-32198

Name: CVE-2021-32198
Creator: NVD / NIST
Published: 2021-06-06T12:15:07.38+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2021-32198 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.15%

62.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Emtec	Zoc	<= 8.02.4

References

http://www.emtec.com/downloads/zoc/zoc_changes.txtRelease Notes, Vendor Advisory
https://pastebin.com/0xhrDvW0Third Party Advisory
http://www.emtec.com/downloads/zoc/zoc_changes.txtRelease Notes, Vendor Advisory
https://pastebin.com/0xhrDvW0Third Party Advisory

Timeline

Published: Jun 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32198?

How severe is CVE-2021-32198?

CVE-2021-32198 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32198?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32198?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST