# NetScaler ADC vulnerabilities > NetScaler ADC is made by Citrix. We track 26 published vulnerabilities listed under that exact name, across 33 versions. 7 of them are on the list of flaws known to be exploited, the newest added on 26 August 2025. Citrix lists newer releases under their own names, such as Netscaler Application Delivery Controller Firmware, so check those pages too. Canonical page: https://www.edgeprotect.io/product/citrix/netscaler_application_delivery_controller ## At a glance - **Made by:** [Citrix](https://www.edgeprotect.io/vendors/citrix) - **Published vulnerabilities:** 26 - **Known to be exploited:** 7 (listed under the name NetScaler ADC) - **Versions tracked:** 33 - **Most recently added to the known-exploited list:** [CVE-2025-7775](https://www.edgeprotect.io/what-is/cve-2025-7775), 26 August 2025. We keep watching the list. ## Is NetScaler ADC listed under other names? Citrix also lists NetScaler ADC under more specific names, such as Netscaler Application Delivery Controller Firmware. Flaws listed only under those names are counted on their own pages, not here. - [Netscaler Application Delivery Controller Firmware](https://www.edgeprotect.io/product/citrix/netscaler_application_delivery_controller_firmware): 29 published vulnerabilities ## Which versions of NetScaler ADC do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "12.1 to before 12.1-55.330" means from 12.1 up to, but not including, 12.1-55.330. - [CVE-2025-7775](https://www.edgeprotect.io/what-is/cve-2025-7775) (Citrix NetScaler Memory Overflow Vulnerability): 12.1 to before 12.1-55.330, 13.1 to before 13.1-59.22, 14.1 to before 14.1-47.48 - [CVE-2025-5777](https://www.edgeprotect.io/what-is/cve-2025-5777) (Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability): 12.1 to before 12.1-55.328, 13.1 to before 13.1-58.32, 14.1 to before 14.1-43.56 - [CVE-2025-6543](https://www.edgeprotect.io/what-is/cve-2025-6543) (Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability): 13.1 to before 13.1-59.19, 14.1 to before 14.1-47.46 - [CVE-2023-6549](https://www.edgeprotect.io/what-is/cve-2023-6549) (Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability): 12.1 to before 12.1-55.302, 13.0 to before 13.0-92.21, 13.1 to before 13.1-51.15, 14.1 to before 14.1-12.35 - [CVE-2023-6548](https://www.edgeprotect.io/what-is/cve-2023-6548) (Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability): 12.1 to before 12.1-55.302, 13.0 to before 13.0-92.21, 13.1 to before 13.1-51.15, 14.1 to before 14.1-12.35 - [CVE-2023-4966](https://www.edgeprotect.io/what-is/cve-2023-4966) (Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability): 12.1 to before 12.1-55.300, 13.0 to before 13.0-92.19, 13.1 to before 13.1-49.15, 14.1 to before 14.1-8.50 - [CVE-2023-3519](https://www.edgeprotect.io/what-is/cve-2023-3519) (Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability): 12.1 to before 12.1-55.297, 13.0 to before 13.0-91.13, 13.1 to before 13.1-49.13 ## Which NetScaler ADC vulnerabilities are being exploited? 7 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2025-7775](https://www.edgeprotect.io/what-is/cve-2025-7775): Citrix NetScaler Memory Overflow Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 19%, known exploited since 26 August 2025. - [CVE-2025-5777](https://www.edgeprotect.io/what-is/cve-2025-5777): Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability. High, CVSS 7.5, chance of use in 30 days >99%, known exploited since 10 July 2025. - [CVE-2025-6543](https://www.edgeprotect.io/what-is/cve-2025-6543): Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 9.8%, known exploited since 30 June 2025. - [CVE-2023-6549](https://www.edgeprotect.io/what-is/cve-2023-6549): Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability. High, CVSS 8.2, chance of use in 30 days 58%, known exploited since 17 January 2024. - [CVE-2023-6548](https://www.edgeprotect.io/what-is/cve-2023-6548): Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability. Medium, CVSS 5.5, chance of use in 30 days 3.2%, known exploited since 17 January 2024. - [CVE-2023-4966](https://www.edgeprotect.io/what-is/cve-2023-4966): Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability. Critical, CVSS 9.4, chance of use in 30 days >99%, known exploited since 18 October 2023. - [CVE-2023-3519](https://www.edgeprotect.io/what-is/cve-2023-3519): Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability. Critical, CVSS 9.8, chance of use in 30 days >99%, known exploited since 19 July 2023. ## Which NetScaler ADC flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2023-4966](https://www.edgeprotect.io/what-is/cve-2023-4966): >99%, Critical (CVSS 9.4), known exploited - [CVE-2025-5777](https://www.edgeprotect.io/what-is/cve-2025-5777): >99%, High (CVSS 7.5), known exploited - [CVE-2023-3519](https://www.edgeprotect.io/what-is/cve-2023-3519): >99%, Critical (CVSS 9.8), known exploited - [CVE-2023-6549](https://www.edgeprotect.io/what-is/cve-2023-6549): 58%, High (CVSS 8.2), known exploited - [CVE-2025-7775](https://www.edgeprotect.io/what-is/cve-2025-7775): 19%, Critical (CVSS 9.8), known exploited - [CVE-2025-6543](https://www.edgeprotect.io/what-is/cve-2025-6543): 9.8%, Critical (CVSS 9.8), known exploited - [CVE-2018-6810](https://www.edgeprotect.io/what-is/cve-2018-6810): 4.6%, High (CVSS 7.5) - [CVE-2018-6809](https://www.edgeprotect.io/what-is/cve-2018-6809): 4.4%, Critical (CVSS 9.8) - [CVE-2025-5349](https://www.edgeprotect.io/what-is/cve-2025-5349): 3.7%, High (CVSS 8.8) - [CVE-2016-2071](https://www.edgeprotect.io/what-is/cve-2016-2071): 3.4%, Critical (CVSS 9.8) ## Questions ### How many vulnerabilities does NetScaler ADC have? We track 26 published vulnerabilities listed under the name NetScaler ADC, across 33 versions. The most recent NetScaler ADC flaw added to the known-exploited list is CVE-2025-7775, on 26 August 2025. ### Which NetScaler ADC vulnerabilities are being exploited? 7 are on the list of flaws known to be exploited. The most recently added are CVE-2025-7775, CVE-2025-5777 and CVE-2025-6543. ### Why are newer NetScaler ADC flaws missing from this page? Citrix also lists NetScaler ADC under more specific names, such as Netscaler Application Delivery Controller Firmware. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list. ### Which versions of NetScaler ADC do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2025-7775, affects 12.1 to before 12.1-55.330, 13.1 to before 13.1-59.22, 14.1 to before 14.1-47.48. The versions for every exploited flaw are listed on this page. ### How do I get alerts for NetScaler ADC? Create a EdgeProtect account and track NetScaler ADC. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running NetScaler ADC? EdgeProtect keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.edgeprotect.io/register Book a demo: https://www.edgeprotect.io/contact