telnet in GNU inetutils through 2.7 allows servers to read arbitrary environment variables from clients via NEW_ENVIRON SEND USERVAR.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4527 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4527-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Andreas Henriksson     April 11, 2026                                https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : inetutils     Version        : 2:2.0-1+deb11u4     CVE ID         : CVE-2026-28372 CVE-2026-32746 CVE-2026-32772     Debian Bug     : 1130741 1130742

    Several vulnerabilities were discovered in the inetutils implementation     of telnetd and telnet, which may result in privilege escalation or     information disclosure.

    CVE-2026-28372

        Ron Ben Yizhak from SafeBreach found that the fix for CVE-2026-24061 was         not complete and can be exploited by abusing systemd service credentials         support added to the login(1) implementation of util-linux in release 2.40.

        While Debian bullseye does not include util-linux 2.40 this problem does         thus not affect it, but was still addressed in case someone manually         updates util-linux and thus exposes this vulnerability.

    CVE-2026-32746

         Adiel Sol, Arad Inbar, Erez Cohen, Nir Somech, Ben Grinberg, Daniel Lubel          of DREAM Security Research Team found that the telnetd server has a buffer          overflow in the LINEMODE SLC (Set Local Characters) suboption handler.
         This can lead to potential pre-login remote code execution.

    CVE-2026-32772

        Justin Swartz discovered that telnet allows servers to read arbitrary         environment variables from clients via NEW_ENVIRON SEND USERVAR.
        This can lead to information disclosure.

    For Debian 11 bullseye, these problems have been fixed in version     2:2.0-1+deb11u4.

    We recommend that you upgrade your inetutils packages.

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

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

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 Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6193 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6193-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     April 03, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : inetutils     CVE ID         : CVE-2026-32746 CVE-2026-32772     Debian Bug     : 1130741 1130742

    Several vulnerabilities were discovered in the inetutils implementation     of telnetd and telnet, which may result in privilege escalation or     information disclosure.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 2:2.4-2+deb12u3.

    For the stable distribution (trixie), these problems have been fixed in     version 2:2.6-3+deb13u3.

    We recommend that you upgrade your inetutils packages.

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

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

  - telnet in GNU inetutils through 2.7 allows servers to read arbitrary environment variables from clients     via NEW_ENVIRON SEND USERVAR. (CVE-2026-32772)

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

ID	Name	Product	Family	Severity
307667	Debian dla-4527 : inetutils-ftp - security update	Nessus	Debian Local Security Checks	high
304942	Debian dsa-6193 : inetutils-ftp - security update	Nessus	Debian Local Security Checks	critical
302261	Linux Distros Unpatched Vulnerability : CVE-2026-32772	Nessus	Misc.	low

Detections

Analytics

CVE-2026-32772

low

Tenable Plugins

high

critical

low