Ref# ADV2025_332 | Date: Sep 24th 2025

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Citrix published a security advisory highlighting vulnerabilities in the following product on September 9th , 2025. It is recommended that you take the necessary precautions by ensuring your products are always updated. 

• XenServer – version 8.4 

For more information on this update, you can follow this URL:
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX695195&articleURL=XenServer_Security_Update_for_CVE_2025_27466_CVE_2025_58142_CVE_2025_58143_and_CVE_2025_58146  

The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary. 

PDF Download: Citrix Security Advisory

References 

• Citrix Security advisories. (September 9th , 2025). Retrieved from Canadian Centre for Cyber Security
  Citrix security advisory (AV25-614) – Canadian Centre for Cyber Security 
•  Citrix advisories. (September 22, 2025). Retrieved from Citrix advisories https://support.citrix.com/support-home/topic-article-list?trendingCategory=20&trendingTopicName=Security%20Bulletin