CVE-2026-88779Memory overflow vulnerability leading to Denial of Service
Updated under an hour ago ()
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It affects NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 4, 2026; federal agencies had to remediate by Oct 7, 2026. Treat that date as your deadline.
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Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
- CVSS
- 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-119
- Known exploited
- Added to CISA KEV Oct 4, 2026; federal remediation due Oct 7, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 0.59% (percentile 47)
- Assigned by
- NetScaler
- NVD analysis
- Analyzed
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
NetScaler ADC netscaler:adc (from the name) | before 14.1-73.41; before 13.1-64.28; before 14.1-73.41 FIPS; before 13.1-37.282 | CNA record |
NetScaler Gateway netscaler:gateway (from the name) | before 14.1-73.41; before 13.1-64.28 | CNA record |
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller | from 13.1 before 13.1-37.282; from 13.1 before 13.1-37.282; from 13.1 before 13.1-64.28; from 14.1 before 14.1-73.41; from 14.1-66.68 through 14.1-73.41 | NVD |
citrix netscaler_gateway citrix:netscaler_gateway | from 13.1 before 13.1-64.28; from 14.1 before 14.1-73.41 | NVD |
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174vendor-advisory
- https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/mitigation, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88779us-government-resource
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.