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CVE-2026-88772

Critical9.5CISA KEV — exploited in the wild

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service

CVSS
9.5v4.0
EPSS (exploit probability)
1.3%70th pct
CISA KEV
Listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS held steady from 1.3% on 2026-09-29 to 1.3% on 2026-10-20, ranging 1.3%–1.3% across 21 daily scores.
2026-09-29 → 2026-10-20 · 21 days · 1.3%–1.3%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-201.3%70.1%
2026-10-191.3%70.0%
2026-10-181.3%70.0%
2026-10-161.3%70.0%
2026-10-151.3%69.9%
2026-10-141.3%69.9%
2026-10-131.3%69.7%
2026-10-121.3%69.7%
2026-10-111.3%69.7%
2026-10-101.3%69.6%
2026-10-091.3%69.6%
2026-10-081.3%69.6%
2026-10-071.3%69.6%
2026-10-061.3%69.5%
2026-10-051.3%69.5%
2026-10-041.3%69.5%
2026-10-031.3%69.5%
2026-10-021.3%69.4%
2026-10-011.3%69.4%
2026-09-301.3%69.4%
2026-09-291.3%69.3%

CISA KEV entrycatalogue 2026.10.20

Date added
2026-09-27
Federal due date
2026-09-30
Known ransomware use
Unknown

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.

Verbatim from the CISA KEV catalogue (CISA KEV, fetched 2026-10-21 07:34 UTC). The due date applies to US federal agencies under BOD 22-01.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • citrix netscaler application delivery controller
  • citrix netscaler gateway

Coverage1 article

References

Facts sourced from NVD, FIRST EPSS, and CISA KEV. Last synced 2026-10-21 07:34 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-21 06:34 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-21 07:34 UTC; score date 2026-10-20
  • KEV: CISA KEV, fetched 2026-10-21 07:34 UTC