Siemens SIMATIC S7-1500 CPU 1518 MFP Use After Free (CVE-2025-21718)

high Tenable OT Security Plugin ID 505840

Version 1.2

Jul 28, 2026, 1:30 PM

  • CVSS metrics ("CVSSv2 score" set to 6.0)
  • CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C")
  • CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C")
  • CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C")
  • CVSSv2 severity (based on CVE-2025-21718, severity decreased from "High" to "Medium")

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