{"id":"CVE-2026-41858","state":"PUBLISHED","title":"Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH-Ecosystem / windows-utilities-release allows a network attacker to estimate VM boot time ","description":"Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH-Ecosystem / windows-utilities-release allows a network attacker to estimate VM boot time and reconstruct a small candidate list to recover the Administrator password. The randomize_password job exists solely to lock the local Administrator account behind an unguessable password as a hardening control. Because the password is derived from a predictable, clock-seeded PRNG, a network attacker who can estimate VM boot time can reconstruct a small candidate list and recover the Administrator password, defeating the hardening control.\n\nAffected versions:\n- windows-utilities-release: all versions prior to v0.23.0 (inclusive); fixed in v0.23.0 or later","publishedAt":"2026-06-04T02:10:34.656Z","updatedAt":"2026-06-04T15:07:20.434Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"vmware"},"assigner":"vmware","products":["Cloud Foundry Foundation windows-utilities-release"],"affected":[{"vendor":"Cloud Foundry Foundation","product":"windows-utilities-release","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.23.0","versionType":"custom"}]}],"references":["https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds/"],"weaknesses":["CWE-338"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41858.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41858","state":"PUBLISHED","datePublished":"2026-06-04T02:10:34.656Z","dateUpdated":"2026-06-04T15:07:20.434Z","assignerShortName":"vmware","assignerOrgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateReserved":"2026-04-22T06:22:10.082Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH-Ecosystem / windows-utilities-release allows a network attacker to estimate VM boot time and reconstruct a small candidate list to recover the Administrator password. The randomize_password job exists solely to lock the local Administrator account behind an unguessable password as a hardening control. Because the password is derived from a predictable, clock-seeded PRNG, a network attacker who can estimate VM boot time can reconstruct a small candidate list and recover the Administrator password, defeating the hardening control.\n\nAffected versions:\n- windows-utilities-release: all versions prior to v0.23.0 (inclusive); fixed in v0.23.0 or later"}],"affected":[{"vendor":"Cloud Foundry Foundation","product":"windows-utilities-release","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.23.0","versionType":"custom"}]}],"references":[{"url":"https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds/"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-338","lang":"en","description":"CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","type":"CWE"}]}],"providerMetadata":{"shortName":"vmware","orgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","dateUpdated":"2026-06-04T02:10:34.656Z"},"impacts":[{"descriptions":[{"lang":"en","value":"A network attacker who can estimate VM boot time can reconstruct a small candidate list and recover the Windows Administrator password, defeating the hardening control (confidentiality impact: HIGH; integrity and availability unaffected)."}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-04T14:21:35.417546Z","id":"CVE-2026-41858","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-04T15:07:20.434Z"}}]}}}