{"cve":"CVE-2021-20201","nvd":{"published":"2021-05-28T11:15:07.900","modified":"2026-06-17T03:33:27.700","status":"Modified","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-400"],"references":["https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks","https://bugzilla.redhat.com/show_bug.cgi?id=1921846","https://security.gentoo.org/glsa/202208-10","https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks","https://bugzilla.redhat.com/show_bug.cgi?id=1921846"],"products":["redhat:enterprise_linux","spice_project:spice"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-20201","score":0.02703,"percentile":0.85946,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}