Ubuntu Security Notices USN-7992-2 USN-7992-2: Inetutils vulnerability Publication date 18 February 2026 Overview Inetutils could allow unintended access to network services. Releases 20.04 LTS 18.04 LTS 16.04 LTS Packages inetutils - Collection of common network programs Details USN-7992-1 fixed vulnerabilities in telnetd in Inetutils. This update provides the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: Kyu Neushwaistein discovered that telnetd in Inetutils incorrectly handled certain environment variables. A remote attacker could use this issue to bypass authentication and open a session as an administrator. USN-7992-1 fixed vulnerabilities in telnetd in Inetutils. This update provides the corresponding update for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: Kyu Neushwaistein discovered that telnetd in Inetutils incorrectly handled certain environment variables. A remote attacker could use this issue to bypass authentication and open a session as an administrator. Update instructions In general, a standard system update will make all the necessary changes. Learn more about how to get the fixes. The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 20.04 LTS focal inetutils-telnetd – 2:1.9.4-11ubuntu0.2+esm3 18.04 LTS bionic inetutils-telnetd – 2:1.9.4-3ubuntu0.1+esm4 16.04 LTS xenial inetutils-telnetd – 2:1.9.4-1ubuntu0.1~esm5 Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2026-24061 CVE-2026-24061 USN-7992-1 USN-7992-1