High [CVE-2026-8452] Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
This high-severity NetScaler (Citrix) advisory covers CVE-2026-8452 affecting Gateway.
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Summary
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
CISA Known Exploited Vulnerability
- Listed:
- Aug 26, 2026 · federal remediation due Aug 29, 2026
- Required action:
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Ransomware use:
- Unknown
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- ADC 14.1 before 72.61
- ADC 13.1 before 63.18
- ADC 14.1 FIPS before 72.61
- ADC 13.1 FIPS and NDcPP before 37.272
- Gateway 14.1 before 72.61
- Gateway 13.1 before 63.18
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- 72.61
- 63.18
- 37.272
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation
Upgrade to a fixed release: 72.61, 63.18, 37.272. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
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