CVE-2026-59104 (GCVE-0-2026-59104)

Vulnerability from cvelistv5 – Published: 2026-11-06 21:41 – Updated: 2026-11-06 21:41
VLAI
Title
UgCS server HCI authentication bypass with empty credentials
Summary
UgCS server before 6.2 contains an authentication bypass in the HCI protocol login handler (LoginHandler) exposed on TCP port 3334. When the user database contains exactly one user (the default single-operator installation), a LoginRequest with empty userLogin and userPassword fields is interpreted as \"use the only user\" rather than as invalid credentials, and the server returns a fully authenticated session. Because the service listens on all interfaces (0.0.0.0) without TLS by default, an unauthenticated remote attacker with network access to port 3334 can obtain an authenticated session without knowing any credential and then issue privileged commands, including commanding connected drones and uploading flight routes.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-287 - Improper Authentication
Assigner
ENISA CNA
References
Impacted products
Vendor Product Version
SPH Engineering UgCS Affected: 0 , < 6.2 (custom)
Create a notification for this product.
Credits
OffSeq Cybersecurity CERT.LV
Show details on NVD website
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