# CVE-2026-12569: PTC Windchill and FlexPLM Improper Input Validation

> Attackers can achieve remote code execution in PTC Windchill and FlexPLM via unsafe deserialization of untrusted data.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/AU:Y/R:U/V:C/U:Red`)
- **Exploited in the wild:** Yes, since 25 Jun 2026 (CISA KEV), used in ransomware
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jun 2026
- **Updated:** 1 Aug 2026
- **Also known as:** GHSA-f345-wxwr-fxfh

## What is CVE-2026-12569?

CVE-2026-12569 is a critical unsafe deserialization vulnerability in PTC FlexPLM, published on 18 Jun 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 PDMlink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.   *  This advisory also applies to all CPS versions
  *  The identified vulnerability also impacts Windchill and FlexPLM releases prior to 11.0 M030

Weakness: CWE-502 (Deserialization of Untrusted Data), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-12569?

It affects 2 products.


Products: Ptc Flexplm, Ptc Windchill Pdmlink.

## How do I fix CVE-2026-12569?

No fix has been published for CVE-2026-12569 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 28 Jun 2026.

## Is CVE-2026-12569 being exploited?

Yes. Attackers have exploited CVE-2026-12569 in the wild since at least 25 Jun 2026, including in ransomware campaigns.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12569 and fix it if it is affected.

What it is: CVE-2026-12569 is a critical unsafe deserialization vulnerability in PTC FlexPLM, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2026-12569 in the wild since at least 25 Jun 2026, including in ransomware campaigns.

Affected product: PTC FlexPLM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-12569/ (Markdown: https://insights.sbomify.com/CVE-2026-12569/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12569
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12569
- OSV: https://osv.dev/vulnerability/CVE-2026-12569

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12569/
Summaries are generated and may contain mistakes; the official description above is the record.