September 27, 2026

CVE Watchtower

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CVE-2026-88773NVD

Vulnerability Summary

Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') 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 and NDcPP; Gateway: before 14.1-73.37 FIPS and before 13.1-64.23.
Severity Level
CRITICAL(9.3)
Published Date
Sep 27, 2026
Last Modified
Sep 27, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
CWE-444: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 9.3 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)High
Availability (Vulnerable System)None
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions
  • Citrix NetScaler ADC < 14.1-73.37
  • Citrix NetScaler ADC < 13.1-64.23
  • Citrix NetScaler ADC < 14.1-73.37 FIPS
  • Citrix NetScaler ADC < 13.1-37.279 and NDcPP
  • Citrix NetScaler Gateway < 14.1-73.37 FIPS
  • Citrix NetScaler Gateway < 13.1-64.23
Patched Versions
  • Citrix NetScaler ADC 14.1-73.37
  • Citrix NetScaler ADC 13.1-64.23
  • Citrix NetScaler ADC 14.1-73.37 FIPS
  • Citrix NetScaler ADC 13.1-37.279 and NDcPP
  • Citrix NetScaler Gateway 14.1-73.37 FIPS
  • Citrix NetScaler Gateway 13.1-64.23
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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External References