{ "document": { "acknowledgments": [ { "names": [ "An anonymous source" ], "summary": "reported this vulnerability to CISA" } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Disclosure is not limited", "tlp": { "label": "WHITE", "url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage" } }, "lang": "en-US", "notes": [ { "category": "legal_disclaimer", "text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).", "title": "Legal Notice and Terms of Use" }, { "category": "summary", "text": "Successful exploitation of this vulnerability could allow an attacker to achieve remote code execution.", "title": "Risk evaluation" }, { "category": "other", "text": "Critical Manufacturing", "title": "Critical infrastructure sectors" }, { "category": "other", "text": "Worldwide", "title": "Countries/areas deployed" }, { "category": "other", "text": "United States", "title": "Company headquarters location" }, { "category": "general", "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.", "title": "Recommended Practices" }, { "category": "general", "text": "Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.", "title": "Recommended Practices" }, { "category": "general", "text": "Locate control system networks and remote devices behind firewalls and isolating them from business networks.", "title": "Recommended Practices" }, { "category": "general", "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.", "title": "Recommended Practices" }, { "category": "general", "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.", "title": "Recommended Practices" }, { "category": "general", "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.", "title": "Recommended Practices" }, { "category": "general", "text": "CISA also recommends users take the following measures to protect themselves from social engineering attacks:", "title": "Recommended Practices" }, { "category": "general", "text": "Do not click web links or open attachments in unsolicited email messages.", "title": "Recommended Practices" }, { "category": "general", "text": "Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.", "title": "Recommended Practices" }, { "category": "general", "text": "Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.", "title": "Recommended Practices" }, { "category": "general", "text": "No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.", "title": "Recommended Practices" } ], "publisher": { "category": "coordinator", "contact_details": "central@cisa.dhs.gov", "name": "CISA", "namespace": "https://www.cisa.gov/" }, "references": [ { "category": "self", "summary": "ICS Advisory ICSA-26-085-03 JSON", "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-085-03.json" }, { "category": "self", "summary": "ICSA Advisory ICSA-26-085-03 - Web Version", "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-085-03" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/topics/industrial-control-systems" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/uscert/ncas/tips/ST04-014" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing" }, { "category": "external", "summary": "Recommended Practices", "url": "https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks" } ], "title": "PTC Windchill Product Lifecycle Management", "tracking": { "current_release_date": "2026-03-26T06:00:00.000000Z", "generator": { "date": "2026-03-25T20:52:00.528371Z", "engine": { "name": "CISA CSAF Generator", "version": "1.0.0" } }, "id": "ICSA-26-085-03", "initial_release_date": "2026-03-26T06:00:00.000000Z", "revision_history": [ { "date": "2026-03-26T06:00:00.000000Z", "legacy_version": "Initial", "number": "1", "summary": "Initial Republication of PTC's CS466318" } ], "status": "final", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version", "name": "11.0_M030", "product": { "name": "PTC Windchill PDMLink: 11.0_M030", "product_id": "CSAFPID-0001" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "11.1_M020", "product": { "name": "PTC Windchill PDMLink: 11.1_M020", "product_id": "CSAFPID-0002" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "11.2.1.0", "product": { "name": "PTC Windchill PDMLink: 11.2.1.0", "product_id": "CSAFPID-0003" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "12.0.2.0", "product": { "name": "PTC Windchill PDMLink: 12.0.2.0", "product_id": "CSAFPID-0004" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "12.1.2.0", "product": { "name": "PTC Windchill PDMLink: 12.1.2.0", "product_id": "CSAFPID-0005" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "13.0.2.0", "product": { "name": "PTC Windchill PDMLink: 13.0.2.0", "product_id": "CSAFPID-0006" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "13.1.0.0", "product": { "name": "PTC Windchill PDMLink: 13.1.0.0", "product_id": "CSAFPID-0007" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "13.1.1.0", "product": { "name": "PTC Windchill PDMLink: 13.1.1.0", "product_id": "CSAFPID-0008" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "13.1.2.0", "product": { "name": "PTC Windchill PDMLink: 13.1.2.0", "product_id": "CSAFPID-0009" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "13.1.3.0", "product": { "name": "PTC Windchill PDMLink: 13.1.3.0", "product_id": "CSAFPID-0010" } } ], "category": "product_name", "name": "Windchill PDMLink" }, { "branches": [ { "category": "product_version", "name": "11.0_M030", "product": { "name": "PTC FlexPLM: 11.0_M030", "product_id": "CSAFPID-0011" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "11.1_M020", "product": { "name": "PTC FlexPLM: 11.1_M020", "product_id": "CSAFPID-0012" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "11.2.1.0", "product": { "name": "PTC FlexPLM: 11.2.1.0", "product_id": "CSAFPID-0013" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "12.0.0.0", "product": { "name": "PTC FlexPLM: 12.0.0.0", "product_id": "CSAFPID-0014" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "12.0.2.0", "product": { "name": "PTC FlexPLM: 12.0.2.0", "product_id": "CSAFPID-0015" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "12.0.3.0", "product": { "name": "PTC FlexPLM: 12.0.3.0", "product_id": "CSAFPID-0016" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "12.1.2.0", "product": { "name": "PTC FlexPLM: 12.1.2.0", "product_id": "CSAFPID-0017" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "12.1.3.0", "product": { "name": "PTC FlexPLM: 12.1.3.0", "product_id": "CSAFPID-0018" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "13.0.2.0", "product": { "name": "PTC FlexPLM: 13.0.2.0", "product_id": "CSAFPID-0019" } } ], "category": "product_name", "name": "FlexPLM" }, { "branches": [ { "category": "product_version", "name": "13.0.3.0", "product": { "name": "PTC FlexPLM: 13.0.3.0", "product_id": "CSAFPID-0020" } } ], "category": "product_name", "name": "FlexPLM" } ], "category": "vendor", "name": "PTC" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-4681", "cwe": { "id": "CWE-94", "name": "Improper Control of Generation of Code ('Code Injection')" }, "notes": [ { "category": "summary", "text": "A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. This issue affects Windchill PDMLink: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.2.0, 12.1.2.0, 13.0.2.0, 13.1.0.0, 13.1.1.0, 13.1.2.0, 13.1.3.0; FlexPLM: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.0.0, 12.0.2.0, 12.0.3.0, 12.1.2.0, 12.1.3.0, 13.0.2.0, 13.0.3.0.", "title": "Vulnerability Summary" }, { "category": "details", "text": "SSVCv2/E:N/A:Y/2026-03-25T06:00:00.000000Z", "title": "SSVC" } ], "product_status": { "known_affected": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, "references": [ { "category": "external", "summary": "cwe.mitre.org", "url": "https://cwe.mitre.org/data/definitions/94.html" }, { "category": "external", "summary": "www.cve.org", "url": "https://www.cve.org/CVERecord?id=CVE-2026-4681" }, { "category": "external", "summary": "www.first.org", "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H" }, { "category": "external", "summary": "www.first.org", "url": "https://www.first.org/cvss/calculator/4.0#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" } ], "remediations": [ { "category": "mitigation", "details": "PTC is aware of the issue and is actively developing a fix. In the meantime, PTC recommends applying the recommended workaround. Until official patches are available, customers must take urgent steps to safeguard their environments. Specifically: Protect any publicly accessible Windchill systems", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "vendor_fix", "details": "While publicly accessible Windchill and FlexPLM systems are at higher risk and require immediate attention, PTC strongly recommends applying the mitigation steps to all deployments, regardless of Internet exposure", "product_ids": [ "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "vendor_fix", "details": "Apply the same precautions to FlexPLM deployments", "product_ids": [ "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "vendor_fix", "details": "The following Apache and IIS HTTP Server configuration update should be IMMEDIATELY applied to every Windchill or FlexPLM system: Customers using Apache HTTP Server should only follow \"Apache HTTP Server Configuration – Workaround Steps\" section steps", "product_ids": [ "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "mitigation", "details": "Customers using Microsoft IIS should only follow \"IIS Configuration - Workaround Steps\" section steps", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "mitigation", "details": "Please explicitly note that the same mitigation steps must also be applied on File Server / Replica Server configurations where applicable", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "mitigation", "details": "For Windchill releases prior to 11.0 M030, workarounds may need to be altered to apply to unsupported previous releases", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] }, { "category": "mitigation", "details": "For Apache HTTP Server and IIS configuration workaround steps, please refer to the official advisory at:https://www.ptc.com/en/about/trust-center/advisory-center/active-advisories/windchill-flexplm-critical-vulnerability.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ], "url": "https://www.ptc.com/en/about/trust-center/advisory-center/active-advisories/windchill-flexplm-critical-vulnerability" }, { "category": "mitigation", "details": "If immediate remediation is not feasible, additional guidance and remediation options are available:https://www.ptc.com/en/about/trust-center/advisory-center/active-advisories/windchill-flexplm-critical-vulnerability.", "product_ids": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ], "url": "https://www.ptc.com/en/about/trust-center/advisory-center/active-advisories/windchill-flexplm-critical-vulnerability" } ], "scores": [ { "cvss_v3": { "baseScore": 10.0, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1" }, "products": [ "CSAFPID-0001", "CSAFPID-0002", "CSAFPID-0003", "CSAFPID-0004", "CSAFPID-0005", "CSAFPID-0006", "CSAFPID-0007", "CSAFPID-0008", "CSAFPID-0009", "CSAFPID-0010", "CSAFPID-0011", "CSAFPID-0012", "CSAFPID-0013", "CSAFPID-0014", "CSAFPID-0015", "CSAFPID-0016", "CSAFPID-0017", "CSAFPID-0018", "CSAFPID-0019", "CSAFPID-0020" ] } ] } ] }