CVE-2017-20190 json
Some Microsoft technologies as used in Windows 8 through 11 allow a temporary client-side performance degradation during processing of mult…
published 2024-03-26 2 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11182
- cvss
- —
- not scored
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-09).
Affected products
- microsoft windows
Classification
- Weakness
-
- CWE-176 Improper Handling of Unicode Encoding
References
Sources
- CVE List CVE-2017-20190
- NVD CVE-2017-20190
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.