VULNERABILITY INTELLIGENCE
CVE-2021-40818
CVSS score9.8 CRITICAL
EPSS probability1.49%
CISA KEVNot currently listed
Published2021-09-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration.
Weakness classification
- nvd@nist.gov: CWE-120
Primary references
- cve@mitre.org — Issue Tracking, Mailing List, Third Party Advisory
- cve@mitre.org — Patch, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory