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Description

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

PUBLISHED Reserved 2026-01-21 | Published 2026-01-21 | Updated 2026-02-26 | Assigner mitre




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

Date added 2026-01-26 | Due date 2026-02-16

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Problem types

CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Product status

Default status
unknown

1.9.3 (custom)
affected

References

www.openwall.com/lists/oss-security/2026/01/20/2 exploit

www.labs.greynoise.io/...-unsolicited-houseguests/index.html third-party-advisory

www.cisa.gov/...erabilities-catalog?field_cve=CVE-2026-24061 government-resource

www.openwall.com/lists/oss-security/2026/01/22/1

lists.debian.org/debian-lts-announce/2026/01/msg00025.html

www.openwall.com/lists/oss-security/2026/01/20/2

www.openwall.com/lists/oss-security/2026/01/20/8

www.gnu.org/software/inetutils/

lists.gnu.org/...ve/html/bug-inetutils/2026-01/msg00004.html

codeberg.org/...mit/fd702c02497b2f398e739e3119bed0b23dd7aa7b

codeberg.org/...mit/ccba9f748aa8d50a38d7748e2e60362edd6a32cc

www.vicarius.io/...ntication-bypass-in-gnu-inetutils-package

www.vicarius.io/...ntication-bypass-in-gnu-inetutils-package

cve.org (CVE-2026-24061)

nvd.nist.gov (CVE-2026-24061)

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