Siemens SIMATIC s7-300 CPU 315 Firmware vulnerabilities

3 CVEs affecting Siemens SIMATIC s7-300 CPU 315 Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2019-18336, published 2020-03-10.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2019-10936, published 2019-10-10. High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days. Affected devices improperly handle large amounts of specially crafted UDP packets. This could allow an unauthenticated remote attacker to trigger a denial of service condition.
CVE-2019-18336, published 2020-03-10. High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days. A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC…
CVE-2019-10923, published 2019-10-10. High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days. An attacker with network access to an affected product may cause a denial of service condition by breaking the real-time synchronization (IRT) of the affected installation.