CVE-2026-24061

CRITICAL

telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root" value for the USER environment variable.

CVSS v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 1/21/2026Modified: 6/17/2026

Related Intelligence (1)

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References (13)

https://codeberg.org/inetutils/inetutils/commit/ccba9f748aa8d50a38d7748e2e60362edd6a32ccPatchhttps://codeberg.org/inetutils/inetutils/commit/fd702c02497b2f398e739e3119bed0b23dd7aa7bPatchhttps://lists.gnu.org/archive/html/bug-inetutils/2026-01/msg00004.htmlMitigationVendor Advisoryhttps://www.gnu.org/software/inetutils/Producthttps://www.openwall.com/lists/oss-security/2026/01/20/2Mailing Listhttps://www.openwall.com/lists/oss-security/2026/01/20/8Mailing Listhttps://www.vicarius.io/vsociety/posts/cve-2026-24061-detection-script-remote-authentication-bypass-in-gnu-inetutils-packageThird Party Advisoryhttps://www.vicarius.io/vsociety/posts/cve-2026-24061-mitigation-script-remote-authentication-bypass-in-gnu-inetutils-packageMitigationThird Party Advisoryhttp://www.openwall.com/lists/oss-security/2026/01/22/1Mailing Listhttps://lists.debian.org/debian-lts-announce/2026/01/msg00025.htmlMailing ListThird Party Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24061US Government Resourcehttps://www.labs.greynoise.io/grimoire/2026-01-22-f-around-and-find-out-18-hours-of-unsolicited-houseguests/index.htmlExploitThird Party Advisoryhttps://www.openwall.com/lists/oss-security/2026/01/20/2#:~:text=root@...a%3A~%20USER='Mailing ListThird Party Advisory