KEV Entry

CVE-2026-88779

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2026-88779

2026-10-04 00:00 UTC

Timestamps

2026-10-04

2026-10-04

Scope

Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability | Affected: Citrix / NetScaler | Description: 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. | 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. | Due date: 2026-10-07 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174 ; https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/ ; 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-2026-88779

References
  • {'id': 'CVE-2026-88779', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-88779'}

927d147d-af17-4c93-a9e6-86641fe38e2c

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-04 20:00 UTC

2026-10-04 20:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-119"
  ],
  "date_added": "2026-10-04",
  "due_date": "2026-10-07",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "NetScaler",
  "vendorProject": "Citrix",
  "vulnerabilityName": "Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability"
}
 -
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