Exploited vulnerability CISA KEV
CVE-2026-8452: Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
CVE-2026-8452 is a vulnerability in Citrix NetScaler ADC and NetScaler Gateway that CISA added to its Known Exploited Vulnerabilities catalog on August 26, 2026, meaning there is evidence it is being exploited. US federal civilian agencies must complete the required action by August 29, 2026.
CVE-2026-8452 is a vulnerability in Citrix NetScaler ADC and NetScaler Gateway that CISA added to its Known Exploited Vulnerabilities catalog on August 26, 2026, meaning there is evidence it is being exploited. US federal civilian agencies must complete the required action by August 29, 2026.
- CVE ID
- CVE-2026-8452
- Vendor / project
- Citrix
- Product
- NetScaler ADC and NetScaler Gateway
- Added to KEV
- Due date
- Days to remediate
- 3
- Known ransomware use
- Unknown
- Weakness
- CWE-119
CISA description #
Citrix NetScaler ADC and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability which could lead to denial of service.
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.
Notes and references #
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-8452
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