CVE-2021-37183 Denial of service in SINEMA Remote Connect Server

Q: Is CVE-2021-37183 being exploited?

There is no known exploitation of CVE-2021-37183 in the wild and no public exploit code.

Q: How do I fix CVE-2021-37183?

No fix has been published for CVE-2021-37183 yet. Limit exposure of the affected software until one is available.

Medium 6.5 Published 14 Sep 2021 Updated 23 Apr 2025

An unauthenticated attacker can send sleep notifications to managed devices via SINEMA Remote Connect Server, causing a Denial-of-Service condition.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-37183?

CVE-2021-37183 is a medium-severity denial of service vulnerability in Siemens Sinema Remote Connect Server, published on 14 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.0 SP2). The affected software allows sending send-to-sleep notifications to the managed devices. An unauthenticated attacker in the same network of the affected system can abuse these notifications to cause a Denial-of-Service condition in the managed devices.

Weakness: CWE-284

Which versions are affected by CVE-2021-37183?

It affects 1 product.

Products include Siemens Sinema Remote Connect Server.

How do I fix CVE-2021-37183?

No fix has been published for CVE-2021-37183 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-37183 being exploited?

There is no known exploitation of CVE-2021-37183 in the wild and no public exploit code.

All Siemens Sinema Remote Connect Server vulnerabilities

Sources

Also known as GHSA-q64v-qf3j-577f.