CVE-2026-88779
HIGH 8.7 KNOWN EXPLOITEDVulnerability 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.
Confirmed exploited in the wild — in CISA KEV since 2026-10-04. Patch or mitigate now.
Exploitation likelihood
11.4%chance of exploitation in 30 days · 96th percentile
Impact if exploited
8.7CVSS 4.0 · HIGH
- ConfidentialityNone
- IntegrityNone
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Affected
Products Adc Gateway Netscaler Application Delivery Controller Netscaler Gateway
Weakness (CWE)
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS vector
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
References and research data (JSON)
Additional exploitation reports
Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.
- ENISA EU KEV · 2026-10-02EUVD · EUVD-2026-92065
- VulnCheck KEV · 2026-10-03T00:00:00Z
Source guidance: 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.
Source ransomware assessment: Unknown
VulnCheck KEV · CVE-2026-88779 · Updated 2026-10-03T00:00:00Z - VulnCheck KEV · 2026-10-03T00:00:00ZVulnCheck KEV · CVE-2026-88779
- VulnCheck KEV · 2026-10-04T00:00:00ZVulnCheck KEV · CVE-2026-88779
- VulnCheck KEV · 2026-10-06T00:00:00ZVulnCheck KEV · CVE-2026-88779
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1-37.282 |
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1-37.282 |
| Citrix | Netscaler Application Delivery Controller | ≥ 13.1 and < 13.1-64.28 |
| Citrix | Netscaler Application Delivery Controller | ≥ 14.1 and < 14.1-73.41 |
| Citrix | Netscaler Application Delivery Controller | ≥ 14.1-66.68 and ≤ 14.1-73.41 |
| Citrix | Netscaler Gateway | ≥ 13.1 and < 13.1-64.28 |
| Citrix | Netscaler Gateway | ≥ 14.1 and < 14.1-73.41 |
All CVSS metrics
- HIGH 8.7 v4.0 · CNA Primary
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 - HIGH 8.7 v4.0 · NVD Secondary
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/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 - HIGH 7.5 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Patches & mitigations
- https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/ CVE record · CISA-ADP · Updated 2026-10-05T03:55:38.096Z
NVD · CVE-2026-88779 · Updated 2026-10-05T13:35:24.663
VulnCheck KEV · CVE-2026-88779 · Updated 2026-10-03T00:00:00Z
Advisories
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174 CVE record · NetScaler · Updated 2026-10-04T02:35:35.525Z
NVD · CVE-2026-88779 · Updated 2026-10-05T13:35:24.663 - https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88779 CVE record · CISA-ADP · Updated 2026-10-05T03:55:38.096Z
NVD · CVE-2026-88779 · Updated 2026-10-05T13:35:24.663 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-92065 EUVD · EUVD-2026-92065
- https://vulncheck.com/kev VulnCheck KEV · CVE-2026-88779 · Updated 2026-10-03T00:00:00Z
Technical & other
- https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json VulnCheck KEV · CVE-2026-88779 · Updated 2026-10-03T00:00:00Z
- https://www.rapid7.com/blog/post/etr-zero-day-exploitation-of-citrix-netscaler-adc-and-gateway-cve-2026-88771-and-cve-2026-88772/ VulnCheck KEV · CVE-2026-88779 · Updated 2026-10-03T00:00:00Z