CVE-2015-7705: Citrix Xenserver

Critical severity, CVSS 9.8. EPSS: 12.4% chance of exploitation in the next 30 days.

The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.

Affected products

• Citrix Xenserver: version 6.0.2 only; version 6.2.0 only; version 6.5 only; version 7.0 only
• Netapp Clustered Data Ontap: affected versions not specified
• Netapp Data Ontap: affected versions not specified
• Netapp Oncommand Performance Manager: affected versions not specified
• Netapp Oncommand Unified Manager: affected versions not specified
• Ntp Ntp: from 4.2.0, before 4.2.8 (fixed in 4.2.8); from 4.3.0, before 4.3.77 (fixed in 4.3.77); version 4.2.8 only
• Siemens Tim 4r-Ie DNP3 Firmware: any version
• Siemens Tim 4r-Ie Firmware: any version

Published 2017-08-07. Last modified 2026-06-17.