CVE-2026-126325 Critical Remote Code Execution (RCE) vulnerability reported in Windchill
Attackers can achieve remote code execution in PTC Windchill and FlexPLM by sending untrusted serialized data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-126325?
CVE-2026-126325 is a critical unsafe deserialization vulnerability in PTC FlexPLM, published on 11 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Which versions are affected by CVE-2026-126325?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-126325?
No fix has been published for CVE-2026-126325 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-126325 being exploited?
There is no known exploitation of CVE-2026-126325 in the wild and no public exploit code.
Sources
Also known as GHSA-5936-vj68-74r3.