CVE-2026-7839

The record

UltraVNC repeater through 1.8.2.2 initializes the HTTP administration server with a hardcoded default password. In repeater/webgui/settings.c:197, when settings2.txt is absent on first run the repeater writes the literal string "adminadmi2" as the admin password via strcpy_s(saved_password, 64, "adminadmi2"). The HTTP Basic-auth handler wi_decode_auth() checks this password without rate-limiting or lockout. Any remote attacker who can reach the repeater HTTP port (default TCP 80) can authenticate as administrator using the well-known default credential on a fresh or unmodified installation, gaining full control of the repeater configuration including allow/deny rules and session visibility.

Affected packages

Related vulnerabilities

• CVE-2026-87950 Use of Hard-coded Credentials vulnerability in Drupal SAML SSO - Service Provider allows… CWE-798
• CVE-2026-75940 A vulnerability was reported in Lenovo Health Android Application, distributed… CWE-798
• CVE-2026-17038 DrEryk Gabinet before 11.5.0 uses hard-coded API credentials in its ticket reporting… CWE-798
• CVE-2026-81640 An attacker could derive the camera's Wi-Fi password and connect to its wireless network. CWE-798
• CVE-2026-79740 Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions… CWE-798
• CVE-2026-79950 Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions… CWE-798
• CVE-2026-79738 Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions… CWE-798
• CVE-2026-86464 In the current development version of Eclipse aeriOS, for which no official release has… CWE-798