Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway) contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for a denial of service.
CISA 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
Read at NIST National Vulnerability Database (CVE API 2.0)
- Vendor
- Citrix
- Product
- NetScaler
- EPSS
- 0.11 (p96)
- CISA KEV
- added 4 Oct 2026, due 7 Oct 2026 (25d overdue)
- Exploitation
- observed in the wild
- Fix
- available
- Weakness
- CWE-119
- Exposure class
- Edge / VPN / firewall
Why it ranks 81 (Critical)
- CISA KEV listed, remediation due 2026-10-07
- EPSS 0.11 (elevated)
- Exposed product class: edge / VPN / firewall
- Widely deployed vendor product (Citrix)
- Covered by 9 independent sources
- Fix available
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
- Vendor advisory (support.citrix.com)
- CVE-2026-88779 on this site · NVD · CVE.org · Vulnpedia · KEV
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