CVE-2017-20190

CVE-2017-20190 is a security vulnerability that is still awaiting full analysis and scoring. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-176.

Key facts

Description

Some Microsoft technologies as used in Windows 8 through 11 allow a temporary client-side performance degradation during processing of multiple Unicode combining characters, aka a "Zalgo text" attack. NOTE: third parties dispute whether the computational cost of interpreting Unicode data should be considered a vulnerability.

Frequently asked questions

What is CVE-2017-20190?
Some Microsoft technologies as used in Windows 8 through 11 allow a temporary client-side performance degradation during processing of multiple Unicode combining characters, aka a "Zalgo text" attack. NOTE: third parties dispute whether the computational cost of interpreting Unicode data should be considered a vulnerability.
Is CVE-2017-20190 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2017-20190?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2017-20190 have an EU (EUVD) identifier?
Yes. CVE-2017-20190 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-11182.
When was CVE-2017-20190 published?
CVE-2017-20190 was published on 2024-03-27 and last updated on 2026-06-17.

References

Other CWE-176 vulnerabilities

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