NULL pointer dereference in Siemens Ie/pb Link Ha

CVE-2025-40833

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.

EPSS: 0.001 (16.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-40833?
CVE-2025-40833 is a high-severity vulnerability in Siemens Ie/pb Link Ha, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-05-12.
How severe is CVE-2025-40833?
High severity. CVSS v3 base score is 7.5 out of 10.