FKIE_CVE-2026-24061

Vulnerability from fkie_nvd - Published: 2026-01-21 07:16 - Updated: 2026-09-30 11:47
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root" value for the USER environment variable.
References
cve@mitre.orghttps://codeberg.org/inetutils/inetutils/commit/ccba9f748aa8d50a38d7748e2e60362edd6a32ccPatch
cve@mitre.orghttps://codeberg.org/inetutils/inetutils/commit/fd702c02497b2f398e739e3119bed0b23dd7aa7bPatch
cve@mitre.orghttps://lists.gnu.org/archive/html/bug-inetutils/2026-01/msg00004.htmlMitigation, Vendor Advisory
cve@mitre.orghttps://redteam.ae/blog/cve-2026-24061-inetutils-telnetd-root-bypassExploit, Third Party Advisory
cve@mitre.orghttps://www.gnu.org/software/inetutils/Product
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2026/01/20/2Mailing List
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2026/01/20/8Mailing List
cve@mitre.orghttps://www.vicarius.io/vsociety/posts/cve-2026-24061-detection-script-remote-authentication-bypass-in-gnu-inetutils-packageThird Party Advisory
cve@mitre.orghttps://www.vicarius.io/vsociety/posts/cve-2026-24061-mitigation-script-remote-authentication-bypass-in-gnu-inetutils-packageMitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/01/22/1Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2026/01/msg00025.htmlMailing List, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24061US Government Resource
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.labs.greynoise.io/grimoire/2026-01-22-f-around-and-find-out-18-hours-of-unsolicited-houseguests/index.htmlExploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.openwall.com/lists/oss-security/2026/01/20/2#:~:text=root@...a%3A~%20USER='Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
gnu inetutils *
debian debian_linux 11.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Inetutils",
          "vendor": "GNU",
          "versions": [
            {
              "lessThanOrEqual": "2.7",
              "status": "affected",
              "version": "1.9.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cisaActionDue": "2026-02-16",
  "cisaExploitAdd": "2026-01-26",
  "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "GNU InetUtils Argument Injection Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1A15FADC-AD86-4C11-B182-C1AC2D73A3BE",
              "versionEndIncluding": "2.7",
              "versionStartIncluding": "1.9.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a \"-f root\" value for the USER environment variable."
    },
    {
      "lang": "es",
      "value": "telnetd en GNU Inetutils a trav\u00e9s de 2.7 permite la omisi\u00f3n de autenticaci\u00f3n remota a trav\u00e9s de un valor \u0027-f root\u0027 para la variable de entorno USER."
    }
  ],
  "id": "CVE-2026-24061",
  "lastModified": "2026-09-30T11:47:02.427",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "cve@mitre.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-24061",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-27T04:55:30.344896Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-21T07:16:01.597",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://codeberg.org/inetutils/inetutils/commit/ccba9f748aa8d50a38d7748e2e60362edd6a32cc"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://codeberg.org/inetutils/inetutils/commit/fd702c02497b2f398e739e3119bed0b23dd7aa7b"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://lists.gnu.org/archive/html/bug-inetutils/2026-01/msg00004.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://redteam.ae/blog/cve-2026-24061-inetutils-telnetd-root-bypass"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ],
      "url": "https://www.gnu.org/software/inetutils/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2026/01/20/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2026/01/20/8"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vicarius.io/vsociety/posts/cve-2026-24061-detection-script-remote-authentication-bypass-in-gnu-inetutils-package"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://www.vicarius.io/vsociety/posts/cve-2026-24061-mitigation-script-remote-authentication-bypass-in-gnu-inetutils-package"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/01/22/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2026/01/msg00025.html"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24061"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.labs.greynoise.io/grimoire/2026-01-22-f-around-and-find-out-18-hours-of-unsolicited-houseguests/index.html"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2026/01/20/2#:~:text=root@...a%3A~%20USER=\u0027"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-88"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.