CVE-2026-12569: PTC Windchill and FlexPLM Improper Input Validation Vulnerability
What it is
PTC Windchill and FlexPLM contains an improper input validation vulnerability allowing an unauthenticated, remote attacker to execute arbitrary code by sending a malicious request to the network.
What to do
Treat this as urgent. Identify every affected system, starting with anything internet-facing, and apply the vendor fix or mitigation within days. If you cannot patch quickly, isolate or disable the affected service and watch for signs of compromise.
- Priority
- Act now: Patch or mitigate internet-facing systems within days.
- Severity (CVSS)
- 9.3 critical
- CISA assessment (SSVC)
- actively exploited; attackers can automate it at scale; total control of the affected system
- Exploit probability (EPSS, 30 days)
- 46%, higher than 98% of all CVEs
- Added to CISA KEV
- 25 June 2026
- CISA fix-by date
- 28 June 2026 (US federal agencies; a sensible deadline for everyone)
- Ransomware use
- Known
- Weakness
- CWE-20, CWE-502
References
- NIST NVD entry
- CISA KEV entry
- www.ptc.com/en/support/article/CS473270
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-12569
Sources: CISA Known Exploited Vulnerabilities · FIRST Exploit Prediction Scoring System (EPSS) · NIST National Vulnerability Database · CISA Vulnrichment (SSVC), via the CVE Program. This product uses data from the NVD API but is not endorsed or certified by the NVD. Summaries are machine-written from CISA’s description; treat the vendor’s advisory as the authority for fixes.