CVE-2025-40795 Memory corruption in SIMATIC PCS neo V4.1
Unauthenticated remote attackers can execute arbitrary code or cause denial of service via a stack-based buffer overflow in the User Management Component.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40795?
CVE-2025-40795 is a critical memory corruption vulnerability in Siemens SIMATIC PCS neo V4.1, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a stack-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code or to cause a denial of service condition.
Weakness: CWE-121
Which versions are affected by CVE-2025-40795?
It affects 2 products.
Products include Siemens Simatic Pcs Neo, Siemens User Management Component.
How do I fix CVE-2025-40795?
No fix has been published for CVE-2025-40795 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-40795 being exploited?
There is no known exploitation of CVE-2025-40795 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC PCS neo V4.1
Sources
Also known as GHSA-8mhf-qqpq-2vcr.