CVE entry · CVE-2025-7775
CVE-2025-7775: Citrix NetScaler Memory Overflow Vulnerability
Citrix NetScaler ADC and NetScaler Gateway contain a memory overflow vulnerability that could allow for remote code execution and/or denial of service.
- Actively exploited: added to CISA’s KEV catalog on August 26, 2025.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: August 28, 2025.
- CERT-FR alert CERTFR-2025-ALE-012 of August 26, 2025.
Description from CISA’s KEV catalog.
CERT-FR alerts and notices
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CERTFR-2025-ALE-012Vulnérabilité dans Citrix NetScaler ADC et NetScaler Gateway (26 août 2025)
What to do
- Check whether your estate includes Citrix NetScaler, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (support.citrix.com)
- NVD entry (NIST)
- CISA KEV catalog
Other Citrix vulnerabilities
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Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
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Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
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Citrix NetScaler Improper Input Validation Vulnerability
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Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
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Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
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Citrix NetScaler Out-of-Bounds Read Vulnerability