Siemens SIMATIC s7-300 CPU 319f-3 Pn/dp vulnerabilities

3 CVEs affecting Siemens SIMATIC s7-300 CPU 319f-3 Pn/dp, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-40833, published 2026-05-12.

Highest priority

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

CVE-2024-23814, published 2025-02-11. Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days. The integrated ICMP service of the network stack of affected devices can be forced to exhaust its available memory resources when receiving specially crafted messages targeting IP fragment…
CVE-2025-40820, published 2025-12-09. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to…
CVE-2025-40833, published 2026-05-12. High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days. The affected devices contain a null pointer dereference vulnerability while processing specially crafted IPv4 requests. This could allow an attacker to cause denial of service condition. A manual…