FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary headers/requests into the HTTP proxy CONNECT request.

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:54486 advisory.

    * FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow     (CVE-2026-64620)
      * FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code     execution (CVE-2026-64621)
      * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)
      * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)
      * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)
      * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:54487 advisory.

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)
      * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)
      * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)
      * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:54487 advisory.

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-54487 advisory.

    [2:2.11.7-7.5]
    - Backport several CVE fixes (CVE-2026-64624, CVE-2026-67289, CVE-2026-67299,       CVE-2026-68580)       Resolves: RHEL-213169, RHEL-222785, RHEL-222966, RHEL-223605

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:54485 advisory.

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1534:25 advisory.

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)
      * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)
      * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)
      * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-54486 advisory.

    [2:3.10.3-12.8]
    - Backport several CVE fixes (CVE-2026-64620, CVE-2026-64621, CVE-2026-64624,       CVE-2026-67289, CVE-2026-67299, CVE-2026-68580)       Resolves: RHEL-212621, RHEL-212978, RHEL-213168, RHEL-222783, RHEL-222983,       Resolves: RHEL-223604

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-54485 advisory.

    [2:2.11.7-11]
    - Backport several CVE fixes (CVE-2026-64624, CVE-2026-67289, CVE-2026-67299,       CVE-2026-68580)       Resolves: RHEL-213173, RHEL-222796, RHEL-222972, RHEL-223606

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:54486 advisory.

    * FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow     (CVE-2026-64620)

    * FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code     execution (CVE-2026-64621)

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:54487 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    Security Fix(es):

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:54486 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    Security Fix(es):

    * FreeRDP: FreeRDP: Remote code execution or denial of service via heap-based buffer overflow     (CVE-2026-64620)

    * FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code     execution (CVE-2026-64621)

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:54485 advisory.

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)
      * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)
      * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)
      * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:54485 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    Security Fix(es):

    * FreeRDP: FreeRDP: Arbitrary code execution via malicious RDP files (CVE-2026-64624)

    * FreeRDP: FreeRDP: Denial of Service via crafted WindowIcon async message (CVE-2026-67299)

    * FreeRDP: FreeRDP: HTTP Proxy Request Injection via Redirection (CVE-2026-67289)

    * FreeRDP: FreeRDP: Remote code execution or denial of service via audio input integer overflow     (CVE-2026-68580)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the     server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's     ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy     CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised     RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary     headers/requests into the HTTP proxy CONNECT request. (CVE-2026-67289)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
335445	AlmaLinux 10 : freerdp (ALSA-2026:54486)	Nessus	Alma Linux Local Security Checks	Local	critical
335434	AlmaLinux 9 : freerdp (ALSA-2026:54487)	Nessus	Alma Linux Local Security Checks	Local	critical
335428	RockyLinux 9 : freerdp (RLSA-2026:54487)	Nessus	Rocky Linux Local Security Checks	Local	critical
335394	Oracle Linux 9 : freerdp (ELSA-2026-54487)	Nessus	Oracle Linux Local Security Checks	Local	critical
335347	RockyLinux 8 : freerdp (RLSA-2026:54485)	Nessus	Rocky Linux Local Security Checks	Local	critical
335339	MiracleLinux 8 : freerdp-2.11.7-11.el8_10 (AXSA:2026-1534:25)	Nessus	Miracle Linux Local Security Checks	Local	critical
335268	Oracle Linux 10 : freerdp (ELSA-2026-54486)	Nessus	Oracle Linux Local Security Checks	Local	critical
335267	Oracle Linux 8 : freerdp (ELSA-2026-54485)	Nessus	Oracle Linux Local Security Checks	Local	critical
335240	RockyLinux 10 : freerdp (RLSA-2026:54486)	Nessus	Rocky Linux Local Security Checks	Local	critical
335176	RHEL 9 : freerdp (RHSA-2026:54487)	Nessus	Red Hat Local Security Checks	Local	critical
335175	RHEL 10 : freerdp (RHSA-2026:54486)	Nessus	Red Hat Local Security Checks	Local	critical
335159	AlmaLinux 8 : freerdp (ALSA-2026:54485)	Nessus	Alma Linux Local Security Checks	Local	critical
335129	RHEL 8 : freerdp (RHSA-2026:54485)	Nessus	Red Hat Local Security Checks	Local	critical
331635	Linux Distros Unpatched Vulnerability : CVE-2026-67289	Nessus	Misc.	Local	critical

Detections

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CVE-2026-67289

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