CVE-2025-6543
Memory overflow vulnerability leading to unintended control flow and Denial of Service
KEVCRITICAL 9.2EPSS 10.6%
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
- Affected
- NetScaler · ADC · Gateway
- CVSS v4.0 CITRIX
- 9.2 CRITICAL
CVSS:4.0/AV:N/AC:H/AT:P/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 - CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 10.56% chance of exploitation in the next 30 days, 96th percentile
- CISA KEV
- added 2025-06-30
- Published
- 2025-06-25
- Updated
- 2026-02-26
Proof-of-concept exploits (4)
- abrewer251/CVE-2025-6543_CitrixNetScaler_PoC6★ · 2025-07-03
- grupooruss/Citrix-cve-2025-65435★ · 2025-06-26
- lex1010/CVE-2025-65430★ · 2025-06-30
- mingshenhk/CitrixBleed-2-CVE-2025-5777-PoC-17★ · 2025-06-30