CVE-2026-8451
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-8451 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation even though it is not (yet) in the CISA KEV catalog.
A remote, anonymous attacker can exploit multiple vulnerabilities in Citrix Systems NetScaler ADC and Gateway to disclose information, cause a denial-of-service condition, or trigger other unspecified impacts.
CSIRTS triage
- What
- Multiple vulnerabilities allow a remote, anonymous attacker to disclose information, cause a denial-of-service condition, or trigger other unspecified impacts.
- Who is affected
- Users of Citrix Systems NetScaler ADC and Gateway are affected.
- Urgency
- Remediation is high urgency due to the potential for exploitation and high severity.
- Action
- Apply the latest patches for Citrix Systems NetScaler ADC and Gateway.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Elevated exploitation risk15.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 97% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-8451 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (8)
- unknownNCSC-2026-0216 [1.01] [M/H] Vulnerabilities Fixed in Citrix Netscaler ADC and Netscaler Gatewayncsc-nl · 2026-08-18
- criticalCitrix security advisory (AV26-645) – Update 2cccs · 2026-08-17
- unknownCitrix Products Multiple Vulnerabilitieshkcert · 2026-07-03
- unknownAL26-016 - Vulnerability impacting Citrix NetScaler CVE-2026-8451cccs · 2026-07-02
- high[UPDATE] [high] Citrix Systems NetScaler ADC and Gateway: Multiple vulnerabilitiescert-bund · 2026-07-02
- unknownMultiple vulnerabilities in Citrix products (July 1, 2026)cert-fr-avis · 2026-07-01
- unknownNCSC-2026-0216 [1.00] [M/H] Vulnerabilities fixed in Citrix Netscaler ADC and Netscaler Gatewayncsc-nl · 2026-06-30
- highCVE-2026-8451: Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread…nvd · 2026-06-30
External references
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[](https://www.csirts.com/cve/CVE-2026-8451)