CVE-2026-39031_CVE-2026-39031

5.5 / 10

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Basic Information

ID CVE-2026-39031

Source mitre

Published Jun 26, 2026 at 00:00

Modified Jun 29, 2026 at 13:37

Affected Product

Vendor n/a

Product n/a

Version n/a

Affected Versions n/a n/a n/a

CWE Classification

CWE-321

References

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    "published": "2026-06-26T00:00:00.000Z",
    "modified": "2026-06-29T13:37:17.723Z",
    "type": "cve",
    "title": "CVE-2026-39031",
    "source": "mitre",
    "references": "https://usermode.net/cve/lansweeper_lsrunase2_lsencrypt2_cve.pdf\nhttps://github.com/user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2",
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