CVE-2026-27661 Information disclosure in SINEC Security Monitor

Q: Is CVE-2026-27661 being exploited?

There is no known exploitation of CVE-2026-27661 in the wild and no public exploit code.

Q: How do I fix CVE-2026-27661?

No fix has been published for CVE-2026-27661 yet. Limit exposure of the affected software until one is available.

Medium 5.3 Published 10 Mar 2026 Updated 10 Mar 2026

An attacker can access confidential metadata and contributor email addresses from the SINEC Security Monitor server.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-27661?

CVE-2026-27661 is a medium-severity vulnerability in Siemens SINEC Security Monitor, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been identified in SINEC Security Monitor (All versions < V4.9.0). The affected application leaks confidential information in metadata, and files such as information on contributors and email address, on `SSM Server`.

Weakness: CWE-1230

Which versions are affected by CVE-2026-27661?

It affects 1 product.

Products include Siemens Sinec Security Monitor.

How do I fix CVE-2026-27661?

No fix has been published for CVE-2026-27661 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-27661 being exploited?

There is no known exploitation of CVE-2026-27661 in the wild and no public exploit code.

Sources

Also known as GHSA-4mmg-599r-q746.