{"api_version":"1","generated_at":"2026-08-27T13:37:53+00:00","cve":"CVE-2026-81576","urls":{"html":"https://cve.report/CVE-2026-81576","api":"https://cve.report/api/cve/CVE-2026-81576.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-81576","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-81576"},"summary":{"title":"Improper Authentication of Session Handles","description":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","state":"PUBLISHED","assigner":"wibu","published_at":"2026-08-27 10:16:40","updated_at":"2026-08-27 10:16:40"},"problem_types":["CWE-639","CWE-639 CWE-639 Authorization bypass through User-Controlled key"],"metrics":[{"version":"3.1","source":"2fc02b1f-71e7-4514-a878-169626f68903","type":"Secondary","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"references":[{"url":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf","name":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf","refsource":"2fc02b1f-71e7-4514-a878-169626f68903","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81576","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81576","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"wibu-systems-ag","product":"codemeter-runtime","version":"affected 9.00 9.10 custom","platforms":[]},{"source":"CNA","vendor":"wibu-systems-ag","product":"codemeter-runtime","version":"affected 8.00 8.41a custom","platforms":[]},{"source":"CNA","vendor":"wibu-systems-ag","product":"codemeter-runtime","version":"affected 7.00","platforms":[]},{"source":"CNA","vendor":"wibu-systems-ag","product":"codemeter-runtime","version":"affected 6.00","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Andrew Teylu of Vector Informatik GmbH","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://www.wibu.com/products/codemeter/runtime.html","defaultStatus":"unaffected","product":"codemeter-runtime","vendor":"wibu-systems-ag","versions":[{"lessThan":"9.10","status":"affected","version":"9.00","versionType":"custom"},{"lessThan":"8.41a","status":"affected","version":"8.00","versionType":"custom"},{"status":"affected","version":"7.00"},{"status":"affected","version":"6.00"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:*:*:*:*:*:*","versionEndExcluding":"9.10","versionStartIncluding":"9.00","vulnerable":true},{"criteria":"cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:*:*:*:*:*:*","versionEndExcluding":"8.41a","versionStartIncluding":"8.00","vulnerable":true},{"criteria":"cpe:2.3:a:wibu-systems-ag:codemeter-runtime:7.00:*:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:a:wibu-systems-ag:codemeter-runtime:6.00:*:*:*:*:*:*:*","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"credits":[{"lang":"en","type":"reporter","value":"Andrew Teylu of Vector Informatik GmbH"}],"datePublic":"2026-08-25T13:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak<br>SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read<br>license information belonging to another handle."}],"value":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","description":"CWE-639 Authorization bypass through User-Controlled key","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-27T08:00:26.426Z","orgId":"2fc02b1f-71e7-4514-a878-169626f68903","shortName":"wibu"},"references":[{"tags":["vendor-advisory"],"url":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf"}],"source":{"discovery":"EXTERNAL"},"title":"Improper Authentication of Session Handles","x_generator":{"engine":"Vulnogram 1.0.0-beta"}}},"cveMetadata":{"assignerOrgId":"2fc02b1f-71e7-4514-a878-169626f68903","assignerShortName":"wibu","cveId":"CVE-2026-81576","datePublished":"2026-08-27T07:14:11.299Z","dateReserved":"2026-08-27T07:01:24.780Z","dateUpdated":"2026-08-27T08:00:26.426Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-27 10:16:40","lastModifiedDate":"2026-08-27 10:16:40","problem_types":["CWE-639","CWE-639 CWE-639 Authorization bypass through User-Controlled key"],"metrics":{"cvssMetricV31":[{"source":"2fc02b1f-71e7-4514-a878-169626f68903","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.1,"impactScore":4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"81576","Ordinal":"1","Title":"Improper Authentication of Session Handles","CVE":"CVE-2026-81576","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"81576","Ordinal":"1","NoteData":"If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak\nSID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read\nlicense information belonging to another handle.","Type":"Description","Title":"Improper Authentication of Session Handles"}]}}}