CVE-2023-38380: Siemens 6ag1543-1ax00-2xe0 Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE (All versions < V3.4.29), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0) (All versions < V3.0.37), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SINAMICS S210 (6SL5...) (All versions >= V6.1 < V6.1 HF2), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0) (All versions < V3.0.37). The webserver implementation of the affected products does not correctly release allocated memory after it has been used. An attacker with network access could use this vulnerability to cause a denial-of-service condition in the webserver of the affected product.

Affected products

• Siemens 6ag1543-1ax00-2xe0 Firmware: affected versions not specified
• Siemens 6gk7243-8rx30-0xe0 Firmware: affected versions not specified
• Siemens 6gk7543-1ax00-0xe0 Firmware: affected versions not specified
• Siemens SIMATIC CP 1242-7 v2 Firmware: affected versions not specified
• Siemens SIMATIC CP 1243-1 DNP3 Firmware: affected versions not specified
• Siemens SIMATIC CP 1243-1 Firmware: affected versions not specified
• Siemens SIMATIC CP 1243-1 Iec Firmware: affected versions not specified
• Siemens SIMATIC CP 1243-7 Lte Firmware: affected versions not specified
• Siemens Sinamics s210 Firmware: version 5.1 only; version 5.2 only; version 6.1 only

Published 2023-12-12. Last modified 2026-06-17.