The APDFL.dll contains an out-of-bounds write past the fixed-length heap-based buffer while parsing specially crafted PDF files. This could allow an attacker to execute code in the context of the current process.
https://www.cisa.gov/uscert/ics/advisories/icsa-22-349-15
https://cert-portal.siemens.com/productcert/html/ssa-360681.html
https://cert-portal.siemens.com/productcert/csaf/ssa-360681.json