CVE-2026-19490
Undergoing Analysis
Published: 19 Aug 2026, 12:54
Last modified:10 Sept 2026, 03:55
Vulnerability Summary
Overall Risk (default)
high
70/100 CVSS Score
9.3 CRITICAL
v4.0 (cve.org)
EPSS Score
3.37% LOW
3% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected
Timeline
19 Aug 2026, 12:54
Published
Vulnerability first disclosed
09 Sept 2026, 00:00
Added to CISA KEV
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
10 Sept 2026, 03:55
Last Modified
Vulnerability information updated
12 Sept 2026, 00:00
CISA Remediation Due
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.
Description
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
CVSS Metrics
- v4.0•CRITICAL•Score: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
- v4.0•CRITICAL•Score: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/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
EPSS Trends
Current EPSS score: 3.37%• Percentile: 88%
Techniques & Countermeasures
- CWE-288•Authentication Bypass Using an Alternate Path or Channel
The product requires authentication, but the product has an alternate path or channel that does not require authentication.
Affected Systems
- netscaler•adc
≥ 14.1, ≤ 73.32 | ≥ 13.1, ≤ 63.21
- netscaler•gateway
≥ 14.1, ≤ 73.32 | ≥ 13.1, ≤ 63.21