VULNERABILITY INTELLIGENCE
CVE-2021-28683
CVSS score7.5 HIGH
EPSS probability1.69%
CISA KEVNot currently listed
Published2021-05-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.
Weakness classification
- nvd@nist.gov: CWE-476
Primary references
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Not Applicable, Third Party Advisory
- nvd@nist.gov — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Not Applicable, Third Party Advisory