CVE-2026-19489
No known exploitation. EPSS puts it in the 88th percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
3.2% chance of exploitation activity in the next 30 days, which ranks it in the 88th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
7 events over 13 days, from the signal feeds we watch.
- Record updated
- OpenVAS check added
- Record updated
- Publishedweakness classified, att&ck mapped, record updated
Affected products
Technical detail
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
In the news
- CISA orders feds to patch Citrix NetScaler RCE flaw by Saturday
- 24th August – Threat Intelligence Report
- Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490)
- Critical NetScaler Flaw Can Bypass Authentication on Certain Gateway and AAA Servers
- Citrix urges admins to patch new NetScaler flaws as soon as possible
- Exploitation Expected for Critical Authentication Bypass Patched in Citrix NetScaler
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