PT-2026-58855 · Citrix · Xenserver Sdk+1
CVE-2026-42491
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Published
2026-07-14
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Updated
2026-07-19
None
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Name of the Vulnerable Software and Affected Versions
Citrix XenServer SDK versions prior to 26.15.0
XenCenter versions prior to 2026.4.0
Description
Some SDKs lack proper TLS verification during network communication with a host running XAPI. This flaw allows an attacker to perform a Man-in-the-Middle (MITM) attack—where a malicious actor intercepts communication between two parties—to hijack sessions, impersonate privileged administrators, and read or tamper with HTTPS requests.
Recommendations
Update Citrix XenServer SDK to version 26.15.0 or later.
Update XenCenter to version 2026.4.0 or later.
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Related Identifiers
Affected Products
Xencenter
Xenserver Sdk