🛡️ CVE-2026-39031

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-321 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Affected software

CVE-2026-39031 is recorded against 1 package.

  • unknown

Timeline and source

Published on 26 June 2026 and last revised on 29 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
usermode.net
github.com
usermode.net

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-321
Public Exploit ✅ No
Source NVD
Published 2026-06-26
Updated 2026-08-11
Modified 2026-06-29
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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