{"id":"CVE-2026-81576","state":"PUBLISHED","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.","publishedAt":"2026-08-27T07:14:11.299Z","updatedAt":"2026-08-27T13:13:33.594Z","severity":{"score":7.7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","source":"wibu"},"assigner":"wibu","products":["wibu-systems-ag codemeter-runtime"],"affected":[{"vendor":"wibu-systems-ag","product":"codemeter-runtime","defaultStatus":"unaffected","versions":[{"version":"9.00","status":"affected","lessThan":"9.10","versionType":"custom"},{"version":"8.00","status":"affected","lessThan":"8.41a","versionType":"custom"},{"version":"7.00","status":"affected"},{"version":"6.00","status":"affected"}],"collectionURL":"https://www.wibu.com/products/codemeter/runtime.html"}],"references":["https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/81xxx/CVE-2026-81576.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-81576","state":"PUBLISHED","datePublished":"2026-08-27T07:14:11.299Z","dateUpdated":"2026-08-27T13:13:33.594Z","assignerShortName":"wibu","assignerOrgId":"2fc02b1f-71e7-4514-a878-169626f68903","dateReserved":"2026-08-27T07:01:24.780Z"},"containers":{"cna":{"title":"Improper Authentication of Session Handles","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"wibu-systems-ag","product":"codemeter-runtime","defaultStatus":"unaffected","versions":[{"version":"9.00","status":"affected","lessThan":"9.10","versionType":"custom"},{"version":"8.00","status":"affected","lessThan":"8.41a","versionType":"custom"},{"version":"7.00","status":"affected"},{"version":"6.00","status":"affected"}],"collectionURL":"https://www.wibu.com/products/codemeter/runtime.html"}],"references":[{"url":"https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf","tags":["vendor-advisory"]}],"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":{"shortName":"wibu","orgId":"2fc02b1f-71e7-4514-a878-169626f68903","dateUpdated":"2026-08-27T08:00:26.426Z"},"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","source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.0-beta"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-27T13:10:38.008516Z","id":"CVE-2026-81576","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-27T13:13:33.594Z"}}]}}}