Exploited CVEs / CVE-2026-12569
CVE-2026-12569
PTC Windchill and FlexPLM Improper Input Validation Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2026-06-28 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited PTC Windchill and FlexPLM vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2026-06-25.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2026-12569
This is a pre-authentication remote code execution flaw in the Windchill PDMLink component that also ships in FlexPLM, so no valid credentials are needed. PTC first warned customers on June 17, 2026, and confirmed in-the-wild exploitation on June 18. Attackers exploit it through deserialization of untrusted data (CWE-20 combined with CWE-502) and are planting persistent JSP webshells under /Windchill/login/ using a hex naming pattern such as [0-9a-f]{16}.jsp, then staging engineering and design data. Reporting ties this to Cl0p ransomware affiliates who appear to have used it as a zero-day in early June 2026, chaining it with a separate pre-auth information-disclosure defect in the FlexPLM WSDL endpoint. This is the first PTC product ever added to the CISA KEV catalog, added June 25, 2026 with a federal remediation deadline of June 28 under BOD 26-04. The 2 percent EPSS figure understates real risk here because exploitation is already confirmed and automated at scale; the KEV listing and ransomware flag are the deciding signals, not the score.
Do this: Identify every Windchill and FlexPLM instance, prioritizing internet-facing ones, and confirm each is on 11.0 M030 or the specific patched release for its branch per PTC article CS473270; note that all CPS versions are in scope. Because exploitation predates patching, assume possible compromise on any instance exposed before you patched: hunt for JSP files matching /Windchill/login/[0-9a-f]{16}.jsp, check for the file flst.txt used in filesystem enumeration, review outbound connections against PTC's published IoCs including C2 IP 5.180.41.35, and run PTC's forensic triage guidance. Restrict the PLM tier to VPN-only access and place a WAF or proxy in front to block Java serialized payloads until patched. If a webshell or staged data is found, treat it as active intrusion and open incident response, since Cl0p activity here involves data theft and extortion rather than encryption alone.
- Customer & Partner Updates: Remote Code Execution Vulnerability in PTC's Windchill and FlexPLM Solutions (PTC advisory): Primary vendor source with the authoritative affected-version list and remediation steps in article CS473270.
- CISA Adds Two Known Exploited Vulnerabilities to Catalog: Primary government source confirming the June 25 KEV listing and the BOD 26-04 remediation obligation.
- Cl0p Exploitation of PTC Windchill & FlexPLM (CVE-2026-12569), Ransom-ISAC: Recently updated analyst reporting detailing the Cl0p attack chain, webshell paths, and hunting indicators.
AI-generated from public data, 2026-07-25. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-12569
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-12569
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-06-28 (past due).
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Official fix for CVE-2026-12569
Check the vendor's security advisory channel for the patched Windchill and FlexPLM versions and workarounds.
Common questions about CVE-2026-12569
Is CVE-2026-12569 actively exploited?
Yes. CVE-2026-12569 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-06-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 2.3%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2026-12569?
CISA set the federal (BOD 22-01) remediation due date at 2026-06-28, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
What fixes CVE-2026-12569?
Check the vendor's security advisory for the patched Windchill and FlexPLM versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-12569?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-12569's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
