{"id":"CVE-2026-41858","aliases":["EUVD-2026-34195","GHSA-f9p6-prpf-3757"],"status":"published","title":"Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH...","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","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00245,"percentile":0.15804,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-338"],"published":"2026-06-04T02:10:34Z","modified":"2026-07-22T20:10:00Z","products":[{"vendor":"cloud foundry foundation","product":"windows-utilities-release"}],"references":[{"url":"https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41858"},{"url":"https://www.cloudfoundry.org/blog/cve-2026-41858-brute-forceable-windows-admin-creds"},{"url":"https://github.com/advisories/GHSA-f9p6-prpf-3757"}],"sources":{"cve":[{"id":"CVE-2026-41858","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","status":"published","published":"2026-06-04T02:10:34.656Z","modified":"2026-06-04T15:07:20.434Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T13:41:08.498858Z"}],"euvd":[{"id":"EUVD-2026-34195","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","status":"published","published":"2026-06-04T02:10:34Z","modified":"2026-06-04T15:07:20Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:52.744481Z"}],"ghsa":[{"id":"GHSA-f9p6-prpf-3757","title":"Weak Randomness / Insecure Cryptographic Primitive (CWE-338) in Get-RandomPassword in BOSH...","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","status":"published","published":"2026-06-04T03:30:22Z","modified":"2026-06-04T03:30:28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T15:08:32.060893Z"}],"nvd":[{"id":"CVE-2026-41858","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","status":"published","published":"2026-06-04T03:16:19.79Z","modified":"2026-07-22T20:10:00.127Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T14:12:22.022466Z"}]}}