The US Cybersecurity and Infrastructure Security Agency (CISA) added a vulnerability (CVE-2026-12569) in Windchill and FlexPLM, two product lifecycle management software platforms developed by PTC, to its Known Exploited Vulnerabilities (KEV) catalog. Entries in the KEV catalog don’t contain links to reports of exploitation, but PTC’s advisory keeps getting updated with indicators of compromise and advice for defenders, confirming that attackers are dropping JSP webshells on vulnerable systems. CISA ordered US federal civilian government agencies … More → The post JSP webshells being dropped on unpatched PTC Windchill instances appeared first on Help Net Security .

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.   CVE-2026-12569 PTC Windchill and FlexPLM Improper Input Validation Vulnerability CVE-2026-20230 Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add vulnerabilities to the catalog that meet the specified criteria...

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.