CVE-2025-27127 File upload in TIA Project-Server
An attacker with contributor privileges can cause denial of service by uploading a malicious project to Siemens TIA Portal or Project-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-2025-27127?
CVE-2025-27127 is a medium-severity vulnerability in Siemens TIA Project-Server, published on 8 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been identified in TIA Project-Server (All versions < V2.1.1), TIA Project-Server V17 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions < V19 Update 4), Totally Integrated Automation Portal (TIA Portal) V20 (All versions < V20 Update 3). The affected application improperly handles uploaded projects in the document root. This could allow an attacker with contributor privileges to cause denial of service by uploading a malicious project.
Weakness: CWE-434
Which versions are affected by CVE-2025-27127?
How do I fix CVE-2025-27127?
No fix has been published for CVE-2025-27127 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-27127 being exploited?
There is no known exploitation of CVE-2025-27127 in the wild and no public exploit code.
Sources
Also known as GHSA-9rr2-q86m-gg2c.