CVE Feed

    Dashboard / CVE / CVE-2025-6543

    CVE-2025-6543

    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

    Published:Jun 25, 2025
    Last Modified:Feb 26, 2026
    EPS:Jun 25, 2025
    EPSS Score:0.02712
    CVSS Score:9.8

    CISA Notification

    Description

    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

    Required Action:

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Jul 21, 2025
    417 days ago
    Alert Date
    Jun 30, 2025
    438 days ago

    Affected Products

    Vendor
    Citrix
    Product
    Netscaler Application Delivery Controller
    Vendor
    Citrix
    Product
    Netscaler Gateway
    Vendor
    Netscaler
    Product
    Adc
    Vendor
    Netscaler
    Product
    Gateway

    Exploits

    https://github.com/abrewer251/CVE-2025-6543_CitrixNetScaler_PoChttps://github.com/grupooruss/Citrix-cve-2025-6543https://github.com/lex1010/CVE-2025-6543

    Related CVEs

    CVE-2026-19490 (CVSS 9.3) — Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and fro…
    CVE-2026-8452 (CVSS 8.8) — Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavi…
    CVE-2026-3055 (CVSS 9.3) — Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to …
    CVE-2025-7776 (CVSS 8.8) — Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScale…
    CVE-2025-7775 (CVSS 9.2) — Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and N…
    CVE-2025-5349 (CVSS 8.7) — Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway…
    CVE-2025-5777 (CVSS 9.3) — Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN vi…
    CVE-2024-8535 (CVSS 5.8) — Authenticated user can access unintended user capabilities in NetScaler ADC and NetScaler Gateway if the appli…
    CVE-2024-8534 (CVSS 8.4) — Memory safety vulnerability leading to memory corruption and Denial of Service in NetScaler ADC and Gateway if…
    CVE-2024-5492 (CVSS 5.1) — Open redirect vulnerability allows a remote unauthenticated attacker to redirect users to arbitrary websites i…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High