CVE-2026-88778TCP Initial Sequence Number (ISN) prediction
Updated under an hour ago ()
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It affects Citrix NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.38%, higher than 30% of scored CVEs.
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Predictable exact value from previous values 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 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23.
- CVSS
- 8.8 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L
- Weakness (CWE)
- CWE-342
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.38% (percentile 30)
- Assigned by
- NetScaler
- NVD analysis
- Analyzed
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Citrix NetScaler ADC citrix_netscaler:adc (from the name) | before 14.1-73.37; before 13.1-64.23; before 14.1-73.37 FIPS; before 13.1.37.279 FIPS and NDcPP | CNA record |
Citrix NetScaler Gateway citrix_netscaler:gateway (from the name) | before 14.1-73.37; before 13.1-64.23 | CNA record |
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller | from 13.1 before 13.1-64.23; from 13.1 before 13.1.37.279; from 13.1 before 13.1.37.279; from 14.1 before 14.1-73.37; from 14.1-66.68 through 14.1-73.37 | NVD |
citrix netscaler_gateway citrix:netscaler_gateway | from 13.1 before 13.1-64.23; from 14.1 before 14.1-73.37 | NVD |
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.