High severity7.5NVD Advisory· Published Feb 13, 2024· Updated Jun 17, 2026
CVE-2023-51440
CVE-2023-51440
Description
A vulnerability has been identified in SIMATIC CP 343-1 (6GK7343-1EX30-0XE0) (All versions), SIMATIC CP 343-1 Lean (6GK7343-1CX10-0XE0) (All versions), SIPLUS NET CP 343-1 (6AG1343-1EX30-7XE0) (All versions), SIPLUS NET CP 343-1 Lean (6AG1343-1CX10-2XE0) (All versions). Affected products incorrectly validate TCP sequence numbers. This could allow an unauthenticated remote attacker to create a denial of service condition by injecting spoofed TCP RST packets.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
11cpe:2.3:o:siemens:simatic_cp_343-1_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:siemens:simatic_cp_343-1_firmware:*:*:*:*:*:*:*:*
- (no CPE)range: All versions
cpe:2.3:o:siemens:simatic_cp_343-1_lean_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:siemens:simatic_cp_343-1_lean_firmware:-:*:*:*:*:*:*:*
- (no CPE)range: All versions
- cpe:2.3:o:siemens:siplus_net_cp_343-1_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:siplus_net_cp_343-1_lean_firmware:-:*:*:*:*:*:*:*
- Range: All versions
- Range: All versions
- Range: All versions
All versions+ 1 more
- (no CPE)range: All versions
- (no CPE)range: All versions
Patches
Vulnerability mechanics
References
1- cert-portal.siemens.com/productcert/html/ssa-516818.htmlnvdVendor Advisory
News mentions
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