CVE-2026-107406
CRITICAL 9.5Memory overflow vulnerability leading to Remote Code Execution or Denial of Service Vulnerability in NetScaler ADC. NetScaler ADC or NetScaler Gateway must be configured as a SAML SP or SAML IdP, subject to the following version-specific requirements: * For the following versions: Applicable only when configured as a SAML IdP: * NetScaler ADC and NetScaler Gateway between 14.1-73.37 and 14.1-73.41, inclusive * NetScaler ADC 14.1-FIPS between 14.1-73.37 FIPS and 14.1-73.41 FIPS, inclusive * NetScaler ADC and NetScaler Gateway between 13.1-64.23 and 13.1-64.28, inclusive * NetScaler ADC 13.1-FIPS between 13.1-NDcPP 13.1-37.279 and 13.1- 37.282, inclusive For the following versions: Applicable only when configured as a SAML SP or SAML IdP: * NetScaler ADC and NetScaler Gateway before 14.1-73.37 * NetScaler ADC 14.1-FIPS before 14.1-73.37 FIPS * NetScaler ADC and NetScaler Gateway before 13.1-64.23 * NetScaler ADC 13.1-FIPS before13.1-NDcPP 13.1-37.279
Severe if exploited (CVSS 9.5), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
1.9%chance of exploitation in 30 days · 79th percentile
Impact if exploited
9.5CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- 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: Needs a race window or specific setup
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
References and research data (JSON)
Unverified PoC candidates
Catalogue matches for further research. These repositories have not been validated as working exploits.
2 candidates
- https://github.com/techupdate24/citrix-netscaler-rce-cve-2026-107406
A complete guide and workflow for integrating Agile sprints with DevOps CI/CD pipelines.
PoC-in-GitHub · CVE-2026-107406
PoC-in-GitHub · CVE-2026-107406 · Updated 2026-10-09T04:38:58Z - https://github.com/ctroy999/CVE-2026-107406PoC-in-GitHub · CVE-2026-107406
PoC-in-GitHub · CVE-2026-107406 · Updated 2026-10-11T09:27:49Z
All CVSS metrics
- CRITICAL 9.5 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L - CRITICAL 9.5 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/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
References
Advisories
- https://community.citrix.com/techzone-blogs/110_security-updates/protecting-customers-immediate-guidance-for-cve-2026-107406-in-netscaler-adc-and-netscaler-gateway-r1631/ CVE record · CISA-ADP · Updated 2026-10-10T03:55:21.152Z
NVD · CVE-2026-107406 · Updated 2026-10-10T04:18:09.503 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95315 EUVD · EUVD-2026-95315
Technical & other
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697191CVE record · NetScaler · Updated 2026-10-08T21:18:08.336Z
NVD · CVE-2026-107406 · Updated 2026-10-10T04:18:09.503