CVE-2026-12569

PTC Windchill and FlexPLM remote code execution, confirmed exploited in the wild.

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.

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46%chance of exploitation in the next 30 days (EPSS), 98th percentile

25 Junadded to CISA's Known Exploited Vulnerabilities list, 2026

28 Junfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	PTC Windchill and FlexPLM Improper Input Validation Vulnerability
Vendor and product	PTC · Windchill and FlexPLM
Type	remote code execution · CWE-20, CWE-502
Exploited	Confirmed by CISA listed 25 June 2026
Likelihood	one of the most likely to be exploited of every vulnerability tracked
Deadline	28 June 2026 · already passed
Used in ransomware	Yes: CISA reports it used in ransomware campaigns
Advisories	www.ptc.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗

What to do

Three steps, in this order

Step 1

Patch to the fixed version the vendor names, today if the product faces the internet.

Step 2

Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list.

Step 3

Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

CISA's 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.

CISA's 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.

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Questions

CVE-2026-12569 in short

Is CVE-2026-12569 being exploited?

Yes. CISA added CVE-2026-12569 to its Known Exploited Vulnerabilities catalogue on 25 June 2026, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2026-12569?

US federal agencies must remediate it by 28 June 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-12569 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 46%, the 98th percentile of every CVE it scores.

How do I fix CVE-2026-12569?

Patch to the fixed version the vendor names, today if the product faces the internet. Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list. Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.