Vulnerability-Lookup

CVE-2026-9541 (GCVE-0-2026-9541)

Vulnerability from cvelistv5 – Published: 2026-05-26 11:45 – Updated: 2026-05-26 15:18

Title

Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow

Summary

A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Severity

4.8 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

5.3 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-26 15:17 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB CNA under the mitre root

CNA scorecard B 83/100 over 3839 records in the last 180 days details

References

5 references

URL	Tags
https://vuldb.com/vuln/365602	vdb-entrytechnical-description
https://vuldb.com/vuln/365602/cti	signaturepermissions-required
https://vuldb.com/submit/814826	third-party-advisory
https://github.com/albertodemichelis/squirrel/iss…	issue-tracking
https://github.com/biniamf/pocs/tree/main/squirre…	exploit

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	Squirrel	Affected: 3.0 Affected: 3.1 Affected: 3.2 cpe:2.3:a:squirrel:squirrel::::::::

Credits

biniam (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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                "technical-description"
              ],
              "url": "https://vuldb.com/vuln/365602"
            },
            {
              "name": "VDB-365602 | CTI Indicators (IOB, IOC, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/vuln/365602/cti"
            },
            {
              "name": "Submit #814826 | albertodemichelis squirrel 3.2 Heap-based Buffer Overflow",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/submit/814826"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/albertodemichelis/squirrel/issues/327"
            },
            {
              "tags": [
                "exploit"
              ],
              "url": "https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-05-26T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2026-05-26T02:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-05-26T07:56:41.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-9541",
        "datePublished": "2026-05-26T11:45:10.180Z",
        "dateReserved": "2026-05-26T05:51:28.774Z",
        "dateUpdated": "2026-05-26T15:18:15.140Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-9541

Vulnerability from fkie_nvd - Published: 2026-05-26 14:16 - Updated: 2026-07-23 11:10

Severity

5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

URL	Tags
cna@vuldb.com	https://github.com/albertodemichelis/squirrel/issues/327	Exploit, Issue Tracking, Mitigation, Patch
cna@vuldb.com	https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob	Exploit
cna@vuldb.com	https://vuldb.com/submit/814826	Exploit, Third Party Advisory, VDB Entry
cna@vuldb.com	https://vuldb.com/vuln/365602	Third Party Advisory, VDB Entry
cna@vuldb.com	https://vuldb.com/vuln/365602/cti	Permissions Required, VDB Entry
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/albertodemichelis/squirrel/issues/327	Exploit, Issue Tracking, Mitigation, Patch

Impacted products

	Vendor	Product	Version
	squirrel-lang	squirrel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:squirrel:squirrel:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Cnut File Handler"
          ],
          "product": "Squirrel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "3.0"
            },
            {
              "status": "affected",
              "version": "3.1"
            },
            {
              "status": "affected",
              "version": "3.2"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DDA9B279-8931-4C68-9500-534EAB17584C",
              "versionEndIncluding": "3.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."
    },
    {
      "lang": "es",
      "value": "Una falla de seguridad ha sido descubierta en Squirrel hasta la versi\u00f3n 3.2. Afectada es la funci\u00f3n ReadObject del archivo squirrel/sqobject.cpp del componente Cnut File Gestor. Realizar una manipulaci\u00f3n resulta en desbordamiento de b\u00fafer basado en mont\u00edculo. El ataque solo es posible con acceso local. El exploit ha sido publicado al p\u00fablico y puede ser utilizado para ataques. El proyecto fue informado del problema con antelaci\u00f3n a trav\u00e9s de un informe de incidencias, pero a\u00fan no ha respondido."
    }
  ],
  "id": "CVE-2026-9541",
  "lastModified": "2026-07-23T11:10:00.120",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.9,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "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:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9541",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-26T15:17:48.786589Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-26T14:16:46.007",
  "references": [
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation",
        "Patch"
      ],
      "url": "https://github.com/albertodemichelis/squirrel/issues/327"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit"
      ],
      "url": "https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/submit/814826"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/vuln/365602"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Permissions Required",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/vuln/365602/cti"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation",
        "Patch"
      ],
      "url": "https://github.com/albertodemichelis/squirrel/issues/327"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-W3M6-W27H-V4G9

Vulnerability from github – Published: 2026-05-26 15:32 – Updated: 2026-05-26 15:32

Details

Severity

5.3 (Medium)


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

1.9 (Low)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-9541"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-26T14:16:46Z",
    "severity": "LOW"
  },
  "details": "A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-w3m6-w27h-v4g9",
  "modified": "2026-05-26T15:32:10Z",
  "published": "2026-05-26T15:32:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9541"
    },
    {
      "type": "WEB",
      "url": "https://github.com/albertodemichelis/squirrel/issues/327"
    },
    {
      "type": "WEB",
      "url": "https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/814826"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/365602"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/365602/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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",
      "type": "CVSS_V4"
    }
  ]
}

UBUNTU-CVE-2026-9541 (CVE-2026-9541)

Vulnerability from osv_ubuntu – Published: 2026-05-26 14:16 – Updated: 2026-10-17 09:37 – Source website

Details

Severity

5.3 (Medium)


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

5.3 (Medium)


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

1.9 (Low)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-9541	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-9541	REPORT
	https://github.com/albertodemichelis/squirrel/iss…	REPORT
	https://github.com/biniamf/pocs/tree/main/squirre…	REPORT
	https://vuldb.com/submit/814826	REPORT
	https://vuldb.com/vuln/365602	REPORT
	https://vuldb.com/vuln/365602/cti	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-5"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-4",
        "3.1-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8build1"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8",
        "3.1-8build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8build1"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8.2"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8.5"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8.5?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8.3",
        "3.1-8.4",
        "3.1-8.5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsquirrel3-0",
            "binary_version": "3.1-8.3"
          },
          {
            "binary_name": "squirrel3",
            "binary_version": "3.1-8.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "squirrel3",
        "purl": "pkg:deb/ubuntu/squirrel3@3.1-8.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1-8.2",
        "3.1-8.3"
      ]
    }
  ],
  "aliases": [],
  "details": "A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "UBUNTU-CVE-2026-9541",
  "modified": "2026-10-17T09:37:57Z",
  "published": "2026-05-26T14:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-9541"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-9541"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/albertodemichelis/squirrel/issues/327"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oob"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/submit/814826"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/365602"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/365602/cti"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-9541"
  ]
}

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

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-9541 (GCVE-0-2026-9541)

FKIE_CVE-2026-9541

GHSA-W3M6-W27H-V4G9

UBUNTU-CVE-2026-9541 (CVE-2026-9541)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour