xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.

The remote Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6469 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6469-1                   security@debian.org     https://www.debian.org/security/                                  Aron Xu     August 27, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : xrdp     CVE ID         : CVE-2026-32105 CVE-2026-32107 CVE-2026-32623 CVE-2026-32624                      CVE-2026-33145 CVE-2026-33516 CVE-2026-33689 CVE-2026-35512                      CVE-2026-41252 CVE-2026-41521 CVE-2026-42218 CVE-2026-44178                      CVE-2026-44978 CVE-2026-54538 CVE-2026-55238 CVE-2026-55639                      CVE-2026-55645     Debian Bug     : 1134339

    Multiple vulnerabilities were discovered in xrdp, a Remote Desktop     Protocol (RDP) server, which may result in denial of service,     information disclosure, privilege escalation or the execution of     arbitrary code. Several of these issues are exploitable by an     unauthenticated remote attacker.

    This update also changes two defaults, as part of the fixes:

     * Alternate shells supplied by the client are now rejected unless        AllowAlternateShell is explicitly enabled in /etc/xrdp/sesman.ini.
       This is the fix for CVE-2026-33145 and applies even on systems with        a locally modified sesman.ini.

     * The generic VNC proxy session type [vnc-any] is now commented out in        /etc/xrdp/xrdp.ini. It was reachable before authentication and        exposed CVE-2026-41252 and CVE-2026-41521 to unauthenticated        clients. Administrators who need it should re-enable it and restrict        it to specific hosts and ports.

    For the stable distribution (trixie), these problems have been fixed in     version 0.10.1-3.1+deb13u2.

    We recommend that you upgrade your xrdp packages.

    For the detailed security status of xrdp please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/xrdp

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-952a486b39 advisory.

    Update PAM file to better match modern reality.


Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-9d3c766833 advisory.

    Update PAM file to better match modern reality.


Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-bd0a75766f advisory.

    # Release notes for xrdp v0.10.6.1 (2026/07/06)

    ## General announcements

    This release fixes 10 vulnerabilities and 1 regression introduced by a vulnerability fix in the previous     release.

    If you like xrdp, please consider sponsoring or donating to the project. We accept financial contributions     through Open Collective, and direct donations to individual developers via GitHub Sponsors are also     welcome.

    ## Security fixes

    - CVE-2026-41252
    - CVE-2026-41521
    - CVE-2026-44178
    - CVE-2026-42218
    - CVE-2026-44978
    - CVE-2026-54538
    - CVE-2026-55238
    - CVE-2026-55626
    - CVE-2026-55639
    - CVE-2026-55645

    ## New features

    - None

    ## Bug fixes

    - regression: Fix SEGV in xrdp when running over TLS (#3793)

Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-05c06fa0a8 advisory.

    # Release notes for xrdp v0.10.6.1 (2026/07/06)

    ## General announcements

    This release fixes 10 vulnerabilities and 1 regression introduced by a vulnerability fix in the previous     release.

    If you like xrdp, please consider sponsoring or donating to the project. We accept financial contributions     through Open Collective, and direct donations to individual developers via GitHub Sponsors are also     welcome.

    ## Security fixes

    - CVE-2026-41252
    - CVE-2026-41521
    - CVE-2026-44178
    - CVE-2026-42218
    - CVE-2026-44978
    - CVE-2026-54538
    - CVE-2026-55238
    - CVE-2026-55626
    - CVE-2026-55639
    - CVE-2026-55645

    ## New features

    - None

    ## Bug fixes

    - regression: Fix SEGV in xrdp when running over TLS (#3793)

Tenable has extracted the preceding description block directly from the Fedora 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.

  - xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability     in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the     existence of a username on the system, leading to unauthorized information disclosure via username     enumeration. This issue has been fixed in version 0.10.6.1. (CVE-2026-42218)

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the a3a34818-79a0-11f1-b295-98b78501ef2a advisory.

    xrdp projects reports:
    xrdp v0.10.6.1 fixes 10 vulnerabilities and 1 regression introduced             by a vulnerability fix in the previous release.

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

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

ID	Name	Product	Family	Type	Severity
341057	Debian dsa-6469 : xrdp - security update	Nessus	Debian Local Security Checks	Local	critical
330000	Fedora 43 : xrdp (2026-952a486b39)	Nessus	Fedora Local Security Checks	Local	critical
329999	Fedora 44 : xrdp (2026-9d3c766833)	Nessus	Fedora Local Security Checks	Local	critical
327222	Fedora 43 : xrdp (2026-bd0a75766f)	Nessus	Fedora Local Security Checks	Local	critical
327219	Fedora 44 : xrdp (2026-05c06fa0a8)	Nessus	Fedora Local Security Checks	Local	critical
325628	Linux Distros Unpatched Vulnerability : CVE-2026-42218	Nessus	Misc.	Local	medium
325494	FreeBSD : xrdp -- multiple vulnerabilities (a3a34818-79a0-11f1-b295-98b78501ef2a)	Nessus	FreeBSD Local Security Checks	Local	critical

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CVE-2026-42218

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