medium severity September 16, 2026 · 1 min read

CISA ICS Advisory: Siemens WTV676 and WTV776

Here’s what this advisory affects, and what to do about it.

The products listed below contain a denial of service vulnerability that could allow an attacker to force the devices into protection mode under certain conditions. This disables remote connectivity functions (Web Access) to the devices. Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens WTV676 and WTV776 are affected: WTV676-HB6035 Web Interface vers:intdot/ WTV776-HB6035 Web Interface vers:intdot/

CISA ICS Advisory: Siemens WTV676 and WTV776

Denial of Service via Protection Mode

The advisory states that the products contain a denial of service vulnerability that could allow an attacker to force the devices into protection mode under certain conditions. When triggered, this disables the devices’ remote connectivity functions, specifically Web Access. The advisory does not say whether the flaw has been exploited in the wild.

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Affected Products

The following Siemens products are affected:

WTV676-HB6035 Web Interface vers:intdot/
WTV776-HB6035 Web Interface vers:intdot/

Siemens has released updated versions for both products.

What to Do

Apply the vendor’s latest firmware updates to all affected WTV676-HB6035 and WTV776-HB6035 devices.
Inventory operational devices to determine whether any are still running the vulnerable Web Interface versions.
Implement the specific mitigations and configuration guidance provided in the Siemens security advisory.
Monitor Siemens’ official product security channel for any additional updates or further mitigation options.
Where immediate patching is not feasible, evaluate and apply temporary compensating controls recommended by the vendor.

Organizations operating Siemens industrial or medical devices should treat this advisory as high priority for systems that rely on remote Web Access functionality.

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value redacted in this sampleage, relatives, address historySpokeo

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GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Sources: CISA ICS Advisory

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