Thursday 5 November
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Citrix patches critical XenServer flaw allowing unauthenticated host takeover

Severity
Critical
Sources
1

Cloud Software Group has issued updates for Citrix XenServer 8.4 and 9 to fix a critical vulnerability. An unauthenticated attacker on the management network could compromise virtualisation hosts. The bulletin, CTX697256, was published on 3 November 2026 and covers nine CVEs.

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What to do

  1. Apply the security updates for XenServer 8.4 and 9 described in bulletin CTX697256.
  2. Check the CTX697256 bulletin for the full list of nine CVEs and confirm which hosts are affected.

Written by AI from the sources, checked against them

Full story timeline · 1 update

  1. Thu 5 NovemberCritical Citrix XenServer Flaw Allows Unauthenticated Attackers to Take Control of Virtualization HostsGBHackers

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