Citrix XenServer VM Tools for Windows < 9.4.1 Multiple Vulnerabilities

The version of Citrix XenServer VM Tools for Windows installed on the remote host is potentially affected by arbitrary code execution vulnerabilities due to a lack of security descriptors. Note that Nessus has not tested for these issues but has instead relied only on the application's...

XenServer - How to change the management IP addresses of all hosts in the pool

This article describes how to change the management IP address of all hosts in the pool...

PT-2025-23025

Warning: High severity vulnerabilities in @Citrix XenServer VM Tools for Windows CVE-2025-27462, CVE-2025-27463, CVE-2025-27464 impact Windows VMs on XenServer 8.4 & Citrix Hypervisor 8.2 CU1 LTSR, risking sandbox escapes. Act now! Patch https://t.co/SF4q8mMyxr...

PT-2025-23026

Warning: High severity vulnerabilities in @Citrix XenServer VM Tools for Windows CVE-2025-27462, CVE-2025-27463, CVE-2025-27464 impact Windows VMs on XenServer 8.4 & Citrix Hypervisor 8.2 CU1 LTSR, risking sandbox escapes. Act now! Patch https://t.co/SF4q8mMyxr...

PT-2025-23024

Critical vulnerabilities in XenServer Windows VM Tools enable privilege escalation on XenServer 8.4 & Citrix Hypervisor 8.2 CU1 LTSR. Linux VMs unaffected. Update to version 9.4.1+ ASAP. 🔒 CVE-2025-27462 Australia Virtualization https://t.co/JaZh2Ea25r...

XenServer and Citrix Hypervisor Security Update for CVE-2025-27462, CVE-2025-27463, CVE-2025-27464

Description of Problem Issues have been identified in the XenServer VM Tools for Windows that allow an attacker who has the ability to execute arbitrary unprivileged code within a guest Windows VM to compromise that same VM. This issue affects Windows VMs running on either XenServer 8.4 and Citri...

CVE-2010-2619

Citrix XenServer 5.0 Update 2 and earlier, and 5.5 Update 1 and earlier, when using a pvops kernel, allows guest users to cause a denial of service in the host via unspecified vectors that trigger "incorrectly set flags."...

CVE-2010-0633

Unspecified vulnerability in Citrix XenServer 5.0 Update 3 and earlier, and 5.5, allows local users to bypass authentication and execute unspecified Xen API XAPI calls via unknown vectors...

XenServer and Citrix Hypervisor Security Update for CVE-2024-28956

Description of Problem Intel has disclosed a security issue affecting Intel CPUs. This CPU hardware issue may allow privileged code in a guest VM to infer some memory content of another VM that is running on the same CPU core. Although this is not a vulnerability in the XenServer or Citrix...

Driver Disk for Emulex lpfc 14.4.393.31 - For XenServer 8.4

Who should install this driver disk? Customers running the XenServer 8.4 release who use Emulex's lpfc driver and wish to use the latest version of the following: Driver Module| Driver Type| Version ---|---|--- lpfc| Fibre Channel HBA/Storage Controller| 14.4.393.31 Required firmware versions The...

XenServer - VMs on a Cisco USC host do not receive the DHCP settings

When running VMs on a XenServer 8.4 host running on Cisco UCS hardware, the VMs do not receive the DHCP settings...

Resetting SDX Xenserver password if Xenserver is 7.1 and above with xe-serial option

If we have to reset SDX Xenserver password and if we do not have LOM access. we use the Xe-Serial option as mentioned below...

XenServer - Potential performance issues on imported Windows VMs

When importing Windows VMs into XenServer, for example by using the Conversion Manager virtual appliance or the OVF import functionality in XenCenter, in some circumstances these VMs may not have been optimized for peak performance, as they may be missing certain Viridian optimization flags. If y...

Prepare for Citrix Hypervisor 8.2 Cumulative Update 1 End of Life

Citrix Hypervisor 8.2 Cumulative Update 1becomes End of Life onJune 25, 2025. Plan to upgrade to XenServer 8.4 before this date. For more information about XenServer 8.4, see What's New. Key changes in XenServer 8.4 Licensing Only XenServer Premium Edition socket licenses are supported with...

XenServer and Citrix Hypervisor Security Update for CVE-2024-45818

Description of Problem An issue has been identified that affects both XenServer 8 and Citrix Hypervisor 8.2 CU1 LTSR and allows a malicious administrator of a guest VM to cause the host to crash or become unresponsive. This issue has the following identifier: CVE-2024-45818 What Customers Should ...

XenServer 6.x/7.x unsupported with Citrix DaaS and CVAD

XenServer 6.x and 7.x have been end-of-life and are unsupported. Customers still using these versions will see host connections no longer functioning when used with Citrix DaaS and Citrix Virtual Apps and Desktops Version 2411 & later...

Citrix Releases Security Updates for XenServer and Citrix Hypervisor

Citrix released security updates to address multiple vulnerabilities in XenServer and Citrix Hypervisor. A cyber threat actor could exploit some of these vulnerabilities to cause a denial of service condition. CISA encourages users and administrators to review the following and apply necessary...

XenServer and Citrix Hypervisor Security Update for CVE-2024-45817

XenServer and Citrix Hypervisor Security Update Description of Problem An issue has been identified that affects both XenServer 8 and Citrix Hypervisor 8.2 CU1 LTSR and allow a malicious administrator of a guest VM to cause the host to crash or become unresponsive. This issue has the following...

XenServer Security

Introduction We work hard to keep our product secure and endeavour to remediate any exploitable issues. To this end, we regularly release Security Bulletins for vulnerabilites that might affect Citrix Hypervisor and XenServer and software updates that address these vulnerabilities. Overview of th...

XenServer Software Updates

Introduction We provide regular updates to Citrix Hypervisor, XenServer, and XenCenter. These updates can include bug fixes, improvements, and new features. Overview of the Article This article assists you in finding resources that inform you about Citrix Hypervisor and XenServer software updates...