CVE-2025-40833

HighCVSS 7.5/10Last modified Nov 10, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
SiemensIE/PB LINK HA (6GK1411-5BB00)< *
SiemensIE/PB link PN IO (6GK1411-5AB10)< *
SiemensRUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2)< V8.3
SiemensRUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2)< V8.3
SiemensSCALANCE M804PB (6GK5804-0AP00-2AA2)< V8.3
SiemensSCALANCE M812-1 ADSL-Router (6GK5812-1AA00-2AA2)< V8.3
SiemensSCALANCE M812-1 ADSL-Router (6GK5812-1BA00-2AA2)< V8.3
SiemensSCALANCE M816-1 ADSL-Router (6GK5816-1AA00-2AA2)< V8.3
SiemensSCALANCE M816-1 ADSL-Router (6GK5816-1BA00-2AA2)< V8.3
SiemensSCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2)< V8.3
SiemensSCALANCE M874-2 (6GK5874-2AA00-2AA2)< V8.3
SiemensSCALANCE M874-3 (6GK5874-3AA00-2AA2)< V8.3
SiemensSCALANCE M874-3 3G-Router (CN) (6GK5874-3AA00-2FA2)< V8.3
SiemensSCALANCE M876-3 (6GK5876-3AA02-2BA2)< V8.3
SiemensSCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2)< V8.3
SiemensSCALANCE M876-4 (6GK5876-4AA10-2BA2)< V8.3
SiemensSCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2)< V8.3
SiemensSCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2)< V8.3
SiemensSCALANCE MUB852-1 (A1) (6GK5852-1EA10-1AA1)< V8.3
SiemensSCALANCE MUB852-1 (B1) (6GK5852-1EA10-1BA1)< V8.3
SiemensSCALANCE MUM853-1 (A1) (6GK5853-2EA10-2AA1)< V8.3
SiemensSCALANCE MUM853-1 (B1) (6GK5853-2EA10-2BA1)< V8.3
SiemensSCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1)< V8.3
SiemensSCALANCE MUM856-1 (A1) (6GK5856-2EA10-3AA1)< V8.3
SiemensSCALANCE MUM856-1 (B1) (6GK5856-2EA10-3BA1)< V8.3
SiemensSCALANCE MUM856-1 (CN) (6GK5856-2EA00-3FA1)< V8.3
SiemensSCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1)< V8.3
SiemensSCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1)< V8.3
SiemensSCALANCE S615 EEC LAN-Router (6GK5615-0AA01-2AA2)< V8.3
SiemensSCALANCE S615 LAN-Router (6GK5615-0AA00-2AA2)< V8.3
SiemensSCALANCE SC622-2C (6GK5622-2GS00-2AC2)< V3.2
SiemensSCALANCE SC626-2C (6GK5626-2GS00-2AC2)< V3.2
SiemensSCALANCE SC632-2C (6GK5632-2GS00-2AC2)< V3.2
SiemensSCALANCE SC636-2C (6GK5636-2GS00-2AC2)< V3.2
SiemensSCALANCE SC642-2C (6GK5642-2GS00-2AC2)< V3.2
SiemensSCALANCE SC646-2C (6GK5646-2GS00-2AC2)< V3.2
SiemensSCALANCE W1748-1 M12 (6GK5748-1GY01-0AA0)< *
SiemensSCALANCE W1748-1 M12 (6GK5748-1GY01-0TA0)< *
SiemensSCALANCE W1788-1 M12 (6GK5788-1GY01-0AA0)< *
SiemensSCALANCE W1788-2 EEC M12 (6GK5788-2GY01-0TA0)< *
SiemensSCALANCE W1788-2 M12 (6GK5788-2GY01-0AA0)< *
SiemensSCALANCE W1788-2IA M12 (6GK5788-2HY01-0AA0)< *
SiemensSCALANCE W721-1 RJ45 (6GK5721-1FC00-0AA0)< V6.6.0
SiemensSCALANCE W721-1 RJ45 (6GK5721-1FC00-0AB0)< V6.6.0
SiemensSCALANCE W722-1 RJ45 (6GK5722-1FC00-0AA0)< V6.6.0
SiemensSCALANCE W722-1 RJ45 (6GK5722-1FC00-0AB0)< V6.6.0
SiemensSCALANCE W722-1 RJ45 (6GK5722-1FC00-0AC0)< V6.6.0
SiemensSCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA0)< V6.6.0
SiemensSCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA6)< V6.6.0
SiemensSCALANCE W734-1 RJ45 (6GK5734-1FX00-0AB0)< V6.6.0

References

Timeline

Published
May 12, 2026
Last modified
Nov 10, 2026
NVD status
Awaiting Analysis

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CVE-2025-40833: High severity, CVSS 7.5 | Vulnix