{"id":"CVE-2026-39031","aliases":["EUVD-2026-39939","GHSA-22h8-g6qj-g2g4"],"status":"published","title":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key...","description":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key array to encrypt credentials. An 8-character prefix is stored in cleartext alongside the ciphertext. This allows an attacker with local access to recover any encrypted password to plaintext using a single SHA-1 hash and RC4 decryption operation, with no brute force required.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00089,"percentile":0.00397,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-321"],"published":"2026-06-26T00:00:00Z","modified":"2026-06-29T19:27:07Z","exploits":[{"source":"pocgithub","id":"user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2","title":"user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2","date":"2026-06-22","url":"https://github.com/user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2"}],"references":[{"url":"https://usermode.net/cve/lansweeper_lsrunase2_lsencrypt2_cve.pdf","tags":["exploit"]},{"url":"https://github.com/user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39031"},{"url":"https://github.com/advisories/GHSA-22h8-g6qj-g2g4"}],"sources":{"cve":[{"id":"CVE-2026-39031","description":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key array to encrypt credentials. An 8-character prefix is stored in cleartext alongside the ciphertext. This allows an attacker with local access to recover any encrypted password to plaintext using a single SHA-1 hash and RC4 decryption operation, with no brute force required.","status":"published","published":"2026-06-26T00:00:00Z","modified":"2026-06-29T13:37:17.723Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T14:20:02.290587Z"}],"euvd":[{"id":"EUVD-2026-39939","description":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key array to encrypt credentials. An 8-character prefix is stored in cleartext alongside the ciphertext. This allows an attacker with local access to recover any encrypted password to plaintext using a single SHA-1 hash and RC4 decryption operation, with no brute force required.","status":"published","published":"2026-06-26T00:00:00Z","modified":"2026-06-29T13:37:17Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:22.87152Z"}],"ghsa":[{"id":"GHSA-22h8-g6qj-g2g4","title":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key...","description":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key array to encrypt credentials. An 8-character prefix is stored in cleartext alongside the ciphertext. This allows an attacker with local access to recover any encrypted password to plaintext using a single SHA-1 hash and RC4 decryption operation, with no brute force required.","status":"published","published":"2026-06-26T21:32:18Z","modified":"2026-06-29T15:33:09Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T15:09:03.268343Z"}],"nvd":[{"id":"CVE-2026-39031","description":"Lansweeper lsrunase 2.0 and lsencrypt 2.0 use RC4 encryption with a hardcoded 142-byte static key array to encrypt credentials. An 8-character prefix is stored in cleartext alongside the ciphertext. This allows an attacker with local access to recover any encrypted password to plaintext using a single SHA-1 hash and RC4 decryption operation, with no brute force required.","status":"published","published":"2026-06-26T21:16:33.6Z","modified":"2026-06-29T19:27:07.477Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-321"],"updated_at":"2026-11-02T14:12:26.508751Z"}]}}