CVE-2026-19490
Exploitation confirmed. First attested on 2026-09-03 by CISA-ADP, CISA KEV, GCVE · previdian.
- Published2026-08-19
- Fixed in14.1-73.32 · 13.1-37.277 · 13.1-63.21
- WeaknessCWE-288
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTCObserved activity
isMalicious corpus · updated 2026-10-27 15:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-19490?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-19490?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 14.1 | ≥ 14.1, < 14.1-73.32 | 14.1-73.32 | NVD |
| 13.1 | ≥ 13.1, < 13.1-37.277 | 13.1-37.277 | NVD |
| 13.1 | ≥ 13.1, < 13.1-63.21 | 13.1-63.21 | NVD |
| 14.1 | ≥ 14.1-66.68, ≤ 14.1-73.32 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 14.1 | ≥ 14.1, < 14.1-73.32 | 14.1-73.32 | NVD |
| 13.1 | ≥ 13.1, < 13.1-63.21 | 13.1-63.21 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Citrix NetScaler ADC to 14.1-73.32 · 13.1-37.277 · 13.1-63.21
- CISA’s 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 2026-09-12
Advisories and patches
- support.citrix.comVendor Advisory
Detection
read 2026-10-27 00:21 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 3 repositories, unverifiedTarPeg007/CVE-2026-19490BishopFox/CVE-2026-19490-checkCompleTetech-Security/netscaler-cve-2026-19490-check PoC-in-GitHub
CISA Known Exploited Vulnerability
- Date Added
- 2026-09-09
- Patch Due Date
- 2026-09-12
- 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.
Sources
- CISA KEVKEV entry2026-09-09
- GCVEexploitation2026-09-03
- CISA-ADPSSVC decisionactive2026-09-10
- OpenCVESSVC decisionactive—
- CNACVSS 4.09.3read 2026-10-26
- NVDCVSS 3.19.8read 2026-10-26
- CISA-ADPweakness (CWE)CWE-2882026-08-20
- FIRST EPSSEPSS score32.7 %read 2026-10-27
- PoC-in-GitHubproof of concept3read 2026-10-27
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 4.0 vector
- CVSS: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
- Published
- 2026-08-19
- Last Modified
- 2026-10-26
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2026-19490?
Is CVE-2026-19490 actively exploited?
What is the CVSS score for CVE-2026-19490?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.