CVE-2026-121951

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    CVE-2026-121951

    Published: 4 Nov 2026Last Modified: 7 Nov 2026

    Summary: FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event

    Details: FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121951.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qq4-qwxq-49m8, https://nvd.nist.gov/vuln/detail/CVE-2026-121951, https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-slow-path-input-event

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- a34fa7c49d2a39aa49ace1d7bea9656912d8c7cb
    Fixed -97eff6ddfbbfaa8e42a126d362686bd001ff8bdc

    Affected versions

    3.5.1
    3.5.0

    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-2026-121951 | CVE-DB