CVE-2016-9953: Haxx Curl

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

The verify_certificate function in lib/vtls/schannel.c in libcurl 7.30.0 through 7.51.0, when built for Windows CE using the schannel TLS backend, allows remote attackers to obtain sensitive information, cause a denial of service (crash), or possibly have unspecified other impact via a wildcard certificate name, which triggers an out-of-bounds read.

Affected products

• Haxx Curl: from 7.30.0, up to and including 7.51.0

Published 2018-03-12. Last modified 2026-06-17.