How severe is CVE-2021-32198?

CVE-2021-32198 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32198 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32198?

CVE-2021-32198 affects Emtec Zoc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32198?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-32198 published?

CVE-2021-32198 was published on 2021-06-06 and last updated on 2026-06-17.

CVE-2021-32198

CVE-2021-32198 is a critical-severity vulnerability in Emtec Zoc with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Emtec Zoc
Published: 2021-06-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-32198?: CVE-2021-32198 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32198 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32198?: CVE-2021-32198 affects Emtec Zoc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-32198 published?: CVE-2021-32198 was published on 2021-06-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:emtec:zoc:*:*:*:*:*:*:*:*

More vulnerabilities in Emtec Zoc

CVE-2021-40147 — Critical (CVSS 9.8): EmTec ZOC before 8.02.2 allows \e[201~ pastes, a different vulnerability than CVE-2021-32198.
CVE-2019-25589 — Medium (CVSS 6.2): ZOC Terminal 7.23.4 contains a buffer overflow vulnerability in the Shell field of Program Settings that allows local…

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