Vulnerability · Published Sep 16, 2026 · Assigned by siemens

CVE-2026-89207

Medium 6.5

In plain English

A medium-severity security flaw in WTV676-HB6035 Web Interface from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 62.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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).

Affected products (as reported)

Vendor	Product	Versions
Siemens	WTV676-HB6035 Web Interface	0 – before V3.94
Siemens	WTV776-HB6035 Web Interface	0 – before V4.17

Weakness: CWE-1287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

https://cert-portal.siemens.com/productcert/html/ssa-823812.html