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    CVE-2026-121399

    FreeRDP before 3.32.2 contains a memory allocation vulnerability in rdg_receive_packet that allows a malicious RD Gateway to force a 2 GiB client allocation before tunnel authentication. Attackers can send an eight-byte RDG header declaring packet length 0x7FFFFFFF to trigger pre-authentication memory exhaustion and denial of service.

    Published:Nov 3, 2026
    Last Modified:Nov 3, 2026
    EPS:Nov 3, 2026
    EPSS Score:
    CVSS Score:4.3

    Affected Products

    Vendor
    Freerdp
    Product
    Freerdp

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-121961 (CVSS 8.2) — FreeRDP before 3.32.2 contains a use-after-free vulnerability in the freerdp-proxy DRDYNVC tracker when interc…
    CVE-2026-121960 (CVSS 8.7) — FreeRDP before 3.32.2 contains a denial of service vulnerability in the NLA-enabled shadow server when a CredS…
    CVE-2026-121959 (CVSS 7.1) — FreeRDP before 3.32.2 contains an infinite loop vulnerability in websocket_context_read that fails to handle a…
    CVE-2026-121958 (CVSS 8.7) — FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback…
    CVE-2026-121957 (CVSS 8.7) — FreeRDP before 3.32.2 contains a use-after-free vulnerability that allows malicious RDP servers to corrupt cli…
    CVE-2026-121956 (CVSS 8.7) — FreeRDP before 3.32.2 contains a double free in the WinPR Kerberos SSPI retrieveSomeTgt function, which instal…
    CVE-2026-121955 (CVSS 8.7) — FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees the em…

    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
    CVE-2026-121399 — Freerdp (Medium 5.3) | CVE-DB