{"id":"CVE-2026-54203","aliases":["EUVD-2026-54435","GHSA-v8q6-f954-39gq"],"status":"published","title":"TeamDavid: Memory Leak leaking sensitive information","description":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds\n with memory. By repeatedly \nrequesting this endpoint, an attacker can access sensitive \ninformation, including user passwords. Exploitation does not require \nauthentication. This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.","severity":{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00559,"percentile":0.46889,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2026-08-07T09:44:13Z","modified":"2026-10-24T16:10:00Z","products":[{"vendor":"tobit laboratories ag","product":"teamdavid"}],"references":[{"url":"https://chayns.net/77892-10814/tapp/763210?postId=11454","tags":["release-notes"]},{"url":"https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54203"},{"url":"https://david.tobit.software/releasenotes"},{"url":"https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative"},{"url":"https://github.com/advisories/GHSA-v8q6-f954-39gq"}],"sources":{"cve":[{"id":"CVE-2026-54203","title":"TeamDavid: Memory Leak leaking sensitive information","description":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds\n with memory. By repeatedly \nrequesting this endpoint, an attacker can access sensitive \ninformation, including user passwords. Exploitation does not require \nauthentication. This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.","status":"published","published":"2026-08-07T09:44:13.505Z","modified":"2026-09-07T12:46:48.553Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T13:38:09.774038Z"}],"euvd":[{"id":"EUVD-2026-54435","description":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds\n with memory. By repeatedly \nrequesting this endpoint, an attacker can access sensitive \ninformation, including user passwords. Exploitation does not require \nauthentication. This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.","status":"published","published":"2026-08-07T09:44:13Z","modified":"2026-09-07T12:46:48Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T17:28:30.668645Z"}],"ghsa":[{"id":"GHSA-v8q6-f954-39gq","title":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox...","description":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds\n with memory. By repeatedly \nrequesting this endpoint, an attacker can access sensitive \ninformation, including user passwords. Exploitation does not require \nauthentication. This issue affects TeamDavid through Rollout 524.","status":"published","published":"2026-08-07T12:31:58Z","modified":"2026-09-07T15:34:47Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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","level":"critical"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:11:27.182088Z"}],"nvd":[{"id":"CVE-2026-54203","description":"Memory Leak to an Unauthorized Actor vulnerability in Tobit Laboratories AG TeamDavid's Webbox allows reading of sensitive information. When accessing the URL “/.well-known/mta-sts.”, the application responds\n with memory. By repeatedly \nrequesting this endpoint, an attacker can access sensitive \ninformation, including user passwords. Exploitation does not require \nauthentication. This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.","status":"published","published":"2026-08-07T10:16:57.07Z","modified":"2026-10-24T16:10:00.153Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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","level":"critical","assessor":"secondary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:12:35.386166Z"}]}}