Vulnerability in Citrix NetScaler ADC and NetScaler Gateway (August 26, 2025)
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
On August 26, 2025, Citrix published a security bulletin (see Documentation section) regarding, among other things, the vulnerability CVE-2025-7775. This allows for remote code execution and affects all versions of Citrix NetScaler ADC and NetScaler Gateway, in certain...
CSIRTS triage
- What
- A memory overflow vulnerability allows for remote code execution and affects all versions of Citrix NetScaler ADC and NetScaler Gateway.
- Who is affected
- Users of Citrix NetScaler ADC and NetScaler Gateway.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Users should apply the latest patches from Citrix.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.cert.ssi.gouv.fr/alerte/CERTFR-2025-ALE-012/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2025-7775Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-7775 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- criticalexploitedCVE-2025-7775: Citrix NetScaler Memory Overflow Vulnerabilitycisa-kev
Recent advisories for Citrix NetScaler ADC
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[UPDATE] [high] Citrix Systems NetScaler ADC and Gateway: Multiple vulnerabilitiescert-bund · 2026-07-02
- unknownNCSC-2026-0216 [1.00] [M/H] Vulnerabilities fixed in Citrix Netscaler ADC and Netscaler Gatewayncsc-nl · 2026-06-30
- unknown2026-003: Multiple Vulnerabilities in Citrix NetScaler and Citrix ADCcert-eu · 2026-03-23
- criticalexploitedCVE-2025-5777: Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerabilitycisa-kev · 2025-07-10
- unknownMultiple vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway (July 1, 2025)cert-fr-alerte · 2025-07-01
- criticalexploitedCVE-2025-6543: Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerabilitycisa-kev · 2025-06-30
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