CVE-2025-40833
High
Published: 12 May 2026
Published
12 May 2026
Modified
12 May 2026
KEV Added
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Patch
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CVSS Score v4
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score
0.0032
24.2th percentile
Summary
CVE-2025-40833 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Siemens (inferred from references). Its CVSS base score is 8.7 (High).
Operationally, ranked at the 24.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-209778
Vulnerability details
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 restart is required to recover the system.
- CWE(s)
Related Threats
CVEs Like This One
CVE-2026-33853Shared CWE-476
CVE-2026-27651Shared CWE-476
CVE-2025-66769Shared CWE-476
CVE-2026-4652Shared CWE-476
CVE-2026-28224Shared CWE-476
CVE-2026-31397Shared CWE-476
CVE-2026-28212Shared CWE-476
CVE-2026-41642Shared CWE-476
CVE-2025-24177Shared CWE-476
CVE-2026-20875Shared CWE-476
Affected Assets
Siemens
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inferred from references and description; NVD did not file a CPE for this CVE
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.