CVE-2026-89207: Unauth Remote Input Validation Flaw in Siemens WTV Web Interface (Pre3.94/4.17)
CVE-2026-89207 Published on September 16, 2026
A vulnerability has been identified in WTV676-HB6035 Web Interface (All versions < V3.94), WTV776-HB6035 Web Interface (All versions < V4.17). Affected devices do not properly validate input received from backend services. This could allow an unauthenticated remote attacker to force the device into protection mode, which results in losing remote connectivity functions (Web Access).
Weakness Type
Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
Affected Versions
Siemens WTV676-HB6035 Web Interface:- Before V3.94 is affected.
- Before V4.17 is affected.