Memory Corruption in Citrix NetScaler DNS Service
CVE-2026-107408

9.3CRITICAL

Key Information:

Vendor

Citrix Netscaler

Status
Adc
Gateway
Vendor
CVE Published:
13 November 2026

What is CVE-2026-107408?

A memory corruption issue within the DNS and DNS-over-HTTPS (DoH) implementation of Citrix NetScaler can result in unpredictable behavior and potential system instability. This vulnerability may lead to denial of service, affecting the availability and reliability of the product. Organizations using Citrix NetScaler are advised to assess their systems and apply necessary updates or mitigations to safeguard against exploitation.

Affected Version(s)

ADC 0 < 14.1-73.57

ADC 0 < 13.1-64.39

ADC 0 < 14.1-73.58 FIPS

References

https://support.citrix.com/support-home/kbsearch/article?...

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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