CVE-2011-10035 (GCVE-0-2011-10035)

Vulnerability from cvelistv5 – Published: 2025-10-30 21:41 – Updated: 2025-11-17 18:21
VLAI
Title
Nagios XI < 2011R1.9 Race Conditions in Crontab Install Scripts LPE
Summary
Nagios XI versions prior to 2011R1.9 contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to time-of-check/time-of-use race conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-31 13:05 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6614 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Nagios XI Affected: 0 , < 2011R1.9 (custom)
    cpe:2.3:a:nagios:nagios_xi:2011:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2011-10035",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-31T13:05:44.124387Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-31T13:24:30.803Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Installer / maintenance scripts"
          ],
          "product": "XI",
          "vendor": "Nagios",
          "versions": [
            {
              "lessThan": "2011R1.9",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:*:*:*:*:*:*:*",
                  "versionEndExcluding": "r1.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "0a29406d9794e4f9b30b3c5d6702c708"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Nagios XI versions prior to\u0026nbsp;2011R1.9\u0026nbsp;contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to \u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003etime-of-check/time-of-use\u0026nbsp;\u003c/span\u003erace conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges.\u003cbr\u003e"
            }
          ],
          "value": "Nagios XI versions prior to\u00a02011R1.9\u00a0contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to time-of-check/time-of-use\u00a0race conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-29",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-17T18:21:35.708Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "release-notes",
            "patch"
          ],
          "url": "https://www.nagios.com/changelog/nagios-xi/"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/nagios-xi-race-conditions-in-crontab-install-script-lpe"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Nagios addresses this vulnerability as \"Fixed security escalation race conditions in crontab install scripts.\"\u003cbr\u003e"
            }
          ],
          "value": "Nagios addresses this vulnerability as \"Fixed security escalation race conditions in crontab install scripts.\""
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Nagios XI \u003c 2011R1.9 Race Conditions in Crontab Install Scripts LPE",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2011-10035",
    "datePublished": "2025-10-30T21:41:36.116Z",
    "dateReserved": "2025-10-28T20:05:51.321Z",
    "dateUpdated": "2025-11-17T18:21:35.708Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2011-10035",
      "date": "2026-10-20",
      "epss": "0.00233",
      "percentile": "0.13348"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "modules": [
                  "Installer / maintenance scripts"
                ],
                "product": "XI",
                "vendor": "Nagios",
                "versions": [
                  {
                    "lessThan": "2011R1.9",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "disclosure@vulncheck.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F5A0F705-A92D-4A44-820E-AA95C185FD0A",
                    "versionEndIncluding": "2009",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1:*:*:*:*:*:*",
                    "matchCriteriaId": "B2FB1221-7B2A-4C1F-877B-87A85C5F67F3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.1:*:*:*:*:*:*",
                    "matchCriteriaId": "B8A58F77-B01F-43E5-8AB8-9BBC7AFB8EA6",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.2:*:*:*:*:*:*",
                    "matchCriteriaId": "930BA0E1-526F-444D-B55C-0F3986B28204",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.3:*:*:*:*:*:*",
                    "matchCriteriaId": "12F74EFA-B2E0-4DC6-8ECE-8CBD474B5F30",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.4:*:*:*:*:*:*",
                    "matchCriteriaId": "21AB904E-BE1B-420E-AA2E-BC45DF8BC745",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.5:*:*:*:*:*:*",
                    "matchCriteriaId": "4664377B-70C1-403A-9A61-F1CECCBC5CEF",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.6:*:*:*:*:*:*",
                    "matchCriteriaId": "29011240-37E3-499A-AAF1-7B0F722F16A3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.7:*:*:*:*:*:*",
                    "matchCriteriaId": "E0E3B832-C219-475D-A433-6914973DCA3C",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.8:*:*:*:*:*:*",
                    "matchCriteriaId": "5B5DD634-765B-44D0-A1D1-27DC326A3477",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Nagios XI versions prior to\u00a02011R1.9\u00a0contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to time-of-check/time-of-use\u00a0race conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges."
          },
          {
            "lang": "es",
            "value": "Versiones de Nagios XI anteriores a 2011R1.9 contienen vulnerabilidades de escalada de privilegios en los scripts que instalan o actualizan entradas de crontab del sistema. Debido a condiciones de carrera de tiempo de verificaci\u00f3n/tiempo de uso y la falta de sincronizaci\u00f3n o validaci\u00f3n de ruta final, un usuario local con pocos privilegios podr\u00eda manipular el estado del sistema de archivos durante la instalaci\u00f3n de crontab para influir en los archivos o comandos ejecutados con privilegios elevados, lo que resulta en la ejecuci\u00f3n con privilegios superiores."
          }
        ],
        "id": "CVE-2011-10035",
        "lastModified": "2026-10-18T00:10:00.123",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.0,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.0,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "HIGH",
                "attackRequirements": "NONE",
                "attackVector": "LOCAL",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 7.3,
                "baseSeverity": "HIGH",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "disclosure@vulncheck.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2011-10035",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-31T13:05:44.124387Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-10-30T22:15:34.733",
        "references": [
          {
            "source": "disclosure@vulncheck.com",
            "tags": [
              "Release Notes"
            ],
            "url": "https://www.nagios.com/changelog/nagios-xi/"
          },
          {
            "source": "disclosure@vulncheck.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.vulncheck.com/advisories/nagios-xi-race-conditions-in-crontab-install-script-lpe"
          }
        ],
        "sourceIdentifier": "disclosure@vulncheck.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-367"
              }
            ],
            "source": "disclosure@vulncheck.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2011-10035",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-31T13:05:44.124387Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-31T13:05:54.902Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "modules": [
                "Installer / maintenance scripts"
              ],
              "product": "XI",
              "vendor": "Nagios",
              "versions": [
                {
                  "lessThan": "2011R1.9",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:*:*:*:*:*:*:*",
                      "versionEndExcluding": "r1.9",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ],
              "operator": "OR"
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "0a29406d9794e4f9b30b3c5d6702c708"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Nagios XI versions prior to\u0026nbsp;2011R1.9\u0026nbsp;contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to \u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003etime-of-check/time-of-use\u0026nbsp;\u003c/span\u003erace conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges.\u003cbr\u003e"
                }
              ],
              "value": "Nagios XI versions prior to\u00a02011R1.9\u00a0contain privilege escalation vulnerabilities in the scripts that install or update system crontab entries. Due to time-of-check/time-of-use\u00a0race conditions and missing synchronization or final-path validation, a local low-privileged user could manipulate filesystem state during crontab installation to influence the files or commands executed with elevated privileges, resulting in execution with higher privileges."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-29",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "HIGH",
                "attackRequirements": "NONE",
                "attackVector": "LOCAL",
                "baseScore": 7.3,
                "baseSeverity": "HIGH",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-367",
                  "description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-11-17T18:21:35.708Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "tags": [
                "release-notes",
                "patch"
              ],
              "url": "https://www.nagios.com/changelog/nagios-xi/"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/nagios-xi-race-conditions-in-crontab-install-script-lpe"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Nagios addresses this vulnerability as \"Fixed security escalation race conditions in crontab install scripts.\"\u003cbr\u003e"
                }
              ],
              "value": "Nagios addresses this vulnerability as \"Fixed security escalation race conditions in crontab install scripts.\""
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Nagios XI \u003c 2011R1.9 Race Conditions in Crontab Install Scripts LPE",
          "x_generator": {
            "engine": "vulncheck"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2011-10035",
        "datePublished": "2025-10-30T21:41:36.116Z",
        "dateReserved": "2025-10-28T20:05:51.321Z",
        "dateUpdated": "2025-11-17T18:21:35.708Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    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.