Advisory Details

April 15th, 2026

Microsoft vcpkg OpenSSL Uncontrolled Search Path Element Local Privilege Escalation Vulnerability

CVE ID	CVE-2026-34054
CVSS SCORE	7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	vcpkg
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on applications built using the Microsoft vcpkg port of OpenSSL. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the configuration of OpenSSL. The product loads configuration from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of a target process.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://github.com/microsoft/vcpkg/security/advisories/GHSA-p322-v6vw-vrq9
DISCLOSURE TIMELINE	2026-03-10 - Vulnerability reported to vendor 2026-04-15 - Coordinated public release of advisory 2026-04-15 - Advisory Updated
CREDIT	Xavier DANEST

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