CVE-2026-39031
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | n/a | n/a | affected |
Weaknesses
- n/a
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
Additional References
- https://usermode.net/cve/lansweeper_lsrunase2_lsencrypt2_cve.pdf
- https://github.com/user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2
References
- https://usermode.net/cve/lansweeper_lsrunase2_lsencrypt2_cve.pdf
- https://github.com/user6400/cve-2026-39031-lansweeper-lsrunase2-lsencrypt2
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