CVE-2025-5777
NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread
At a glance
- Source
- NVD
- EPSS
- EPSS 99.97 % · percentile 100 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Citrix
- NVD status
- Analyzed
Description
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
Weaknesses (CWE)
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420
- https://doublepulsar.com/citrixbleed-2-exploitation-started-mid-june-how-to-spot-it-f3106392aa71
- https://reliaquest.com/blog/threat-spotlight-citrix-bleed-2-vulnerability-in-netscaler-adc-gateway-devices/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777
- https://www.bleepingcomputer.com/news/security/cisa-tags-citrix-bleed-2-as-exploited-gives-agencies-a-day-to-patch/
- https://labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/
- https://www.theregister.com/2025/07/10/cisa_citrixbleed_kev/
- https://horizon3.ai/attack-research/attack-blogs/cve-2025-5777-citrixbleed-2-write-up-maybe/
- https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
- https://citrixbleed.com
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | CRITICAL 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L | Citrix |
| CVSS 4.0 | CRITICAL 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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 | NVD · secure@citrix.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-18497
- GCVE · GCVE-0-2025-5777
CERT-FR advisories
- CERTFR-2025-AVI-0528 — Multiples vulnérabilités dans les produits Citrix · cert.ssi.gouv.fr
- CERTFR-2025-ALE-009 — Multiples vulnérabilités dans Citrix NetScaler ADC et NetScaler Gateway · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*≥ 12.1 < 12.1-55.328cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*≥ 13.1 < 13.1-37.235cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*≥ 13.1 < 13.1-37.235cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*≥ 13.1 < 13.1-58.32cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*≥ 14.1 < 14.1-43.56cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*≥ 13.1 < 13.1-58.32cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*≥ 14.1 < 14.1-43.56
Affected products
| Product | Versions |
|---|---|
| NetScaler · ADC | affected 14.1 < 43.56 ; affected 13.1 < 58.32 |
| NetScaler · Gateway | affected 14.1 < 43.56 ; affected 13.1 < 58.32 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |