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CVE-2026-88779

High8.7CISA KEV — exploited in the wild

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.

CVSS
8.7v4.0
EPSS (exploit probability)
0.6%47th pct
CISA KEV
Listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS rose from 0.3% on 2026-10-04 to 0.6% on 2026-10-20, ranging 0.3%–0.6% across 16 daily scores.
2026-10-04 → 2026-10-20 · 16 days · 0.3%–0.6%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-200.6%47.3%
2026-10-190.6%47.3%
2026-10-180.6%47.2%
2026-10-160.6%47.2%
2026-10-150.6%47.1%
2026-10-140.6%47.0%
2026-10-130.6%46.9%
2026-10-120.6%46.8%
2026-10-110.6%46.7%
2026-10-100.6%46.7%
2026-10-090.6%46.7%
2026-10-080.6%46.6%
2026-10-070.6%46.6%
2026-10-060.6%46.5%
2026-10-050.5%43.1%
2026-10-040.3%18.2%

CISA KEV entrycatalogue 2026.10.20

Date added
2026-10-04
Federal due date
2026-10-07
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:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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