Quick answers
- Is CVE-2026-77645 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77645 being exploited in the wild.
- How severe is CVE-2026-77645?
- Informational severity, published 20 August 2026.
- Which products and versions are affected?
- PTC Windchill; PTC FlexPLM.
- Is there a fix for CVE-2026-77645?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-77645 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-77645?
- Check whether you run PTC FlexPLM or PTC Windchill. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a deserialization flaw that allows remote code execution. Untrusted data is deserialized without proper validation, enabling an attacker to craft malicious serialized objects that execute arbitrary code upon deserialization. The attack likely requires network access to the affected service. An attacker can achieve remote code execution on systems running vulnerable versions of PTC Windchill. Patch availability has not been confirmed from accessible sources.
Affected products
- PTC Windchill
- PTC FlexPLM
Timeline
- 2026-08-20: disclosed