What’s Vulnerable › Vulnerabilities

CVE-2016-9952

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-12 · updated 2026-06-17
• Weakness: CWE-295

Description

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, makes it easier for remote attackers to conduct man-in-the-middle attacks via a crafted wildcard SAN in a server certificate, as demonstrated by "*.com."

Affected products

• curl: from 7.30.0 through 7.51.0

References

• https://curl.haxx.se/CVE-2016-9952.patch
• https://curl.haxx.se/docs/adv_20161221B.html
• https://curl.haxx.se/CVE-2016-9952.patch
• https://curl.haxx.se/docs/adv_20161221B.html

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