CVE-2025-40833
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductIE/PB LINK HA
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- Siemens IE/PB LINK HAV4.1.2 or later
- Siemens RUGGEDCOM RM1224 LTE(4G) EUV8.3 or later
- Siemens RUGGEDCOM RM1224 LTE(4G) NAMV8.3 or later
- Siemens SCALANCE M804PBV8.3 or later
- Siemens SCALANCE M812-1 ADSL-RouterV8.3 or later
- Siemens SCALANCE M816-1 ADSL-RouterV8.3 or later
- Siemens SCALANCE M826-2 SHDSL-RouterV8.3 or later
- Siemens SCALANCE M874-2V8.3 or later
- Siemens SCALANCE M874-3V8.3 or later
- Siemens SCALANCE M874-3 3G-Router (CN)V8.3 or later
- Siemens SCALANCE M876-3V8.3 or later
- Siemens SCALANCE M876-3 (ROK)V8.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Siemens IE/PB LINK HA | v < V4.1.2 | V4.1.2 |
| Siemens IE/PB link PN IO | 0 | — |
| Siemens RUGGEDCOM RM1224 LTE(4G) EU | v < V8.3 | V8.3 |
| Siemens RUGGEDCOM RM1224 LTE(4G) NAM | v < V8.3 | V8.3 |
| Siemens SCALANCE M804PB | v < V8.3 | V8.3 |
| Siemens SCALANCE M812-1 ADSL-Router | v < V8.3 | V8.3 |
| Siemens SCALANCE M816-1 ADSL-Router | v < V8.3 | V8.3 |
| Siemens SCALANCE M826-2 SHDSL-Router | v < V8.3 | V8.3 |
| Siemens SCALANCE M874-2 | v < V8.3 | V8.3 |
| Siemens SCALANCE M874-3 | v < V8.3 | V8.3 |
| Siemens SCALANCE M874-3 3G-Router (CN) | v < V8.3 | V8.3 |
| Siemens SCALANCE M876-3 | v < V8.3 | V8.3 |
| Siemens SCALANCE M876-3 (ROK) | v < V8.3 | V8.3 |
| Siemens SCALANCE M876-4 | v < V8.3 | V8.3 |
| Siemens SCALANCE M876-4 (EU) | v < V8.3 | V8.3 |
| Siemens SCALANCE M876-4 (NAM) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUB852-1 (A1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUB852-1 (B1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM853-1 (A1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM853-1 (B1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM853-1 (EU) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM856-1 (A1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM856-1 (B1) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM856-1 (CN) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM856-1 (EU) | v < V8.3 | V8.3 |
| Siemens SCALANCE MUM856-1 (RoW) | v < V8.3 | V8.3 |
| Siemens SCALANCE S615 EEC LAN-Router | v < V8.3 | V8.3 |
| Siemens SCALANCE S615 LAN-Router | v < V8.3 | V8.3 |
| Siemens SCALANCE SC622-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE SC626-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE SC632-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE SC636-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE SC642-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE SC646-2C | v < V3.2 | V3.2 |
| Siemens SCALANCE W1748-1 M12 | 0 | — |
| Siemens SCALANCE W1788-1 M12 | 0 | — |
| Siemens SCALANCE W1788-2 EEC M12 | 0 | — |
| Siemens SCALANCE W1788-2 M12 | 0 | — |
| Siemens SCALANCE W1788-2IA M12 | 0 | — |
| Siemens SCALANCE W721-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W722-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W734-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W734-1 RJ45 (USA) | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W738-1 M12 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W748-1 M12 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W748-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W761-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W774-1 M12 EEC | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W774-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W774-1 RJ45 (USA) | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W778-1 M12 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W778-1 M12 EEC | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W778-1 M12 EEC (USA) | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W786-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W786-2 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W786-2 SFP | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W786-2IA RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W788-1 M12 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W788-1 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W788-2 M12 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W788-2 M12 EEC | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE W788-2 RJ45 | v < V6.6.0 | V6.6.0 |
| Siemens SCALANCE WAB762-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM763-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM763-1 (ME) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM763-1 (US) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 (ME) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 (US) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 EEC | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 EEC (ME) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WAM766-1 EEC (US) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUB762-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUB762-1 iFeatures | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUM763-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUM763-1 (US) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUM766-1 | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUM766-1 (ME) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE WUM766-1 (USA) | v < V3.2.0 | V3.2.0 |
| Siemens SCALANCE X204-2 | 0 | — |
| Siemens SCALANCE X204-2FM | 0 | — |
| Siemens SCALANCE X204-2LD | 0 | — |
| Siemens SCALANCE X204-2LD TS | 0 | — |
| Siemens SCALANCE X204-2TS | 0 | — |
| Siemens SCALANCE X206-1 | 0 | — |
| Siemens SCALANCE X206-1LD | 0 | — |
| Siemens SCALANCE X208 | 0 | — |
| Siemens SCALANCE X208PRO | 0 | — |
| Siemens SCALANCE X212-2 | 0 | — |
| Siemens SCALANCE X212-2LD | 0 | — |
| Siemens SCALANCE X216 | 0 | — |
| Siemens SCALANCE X224 | 0 | — |
| Siemens SCALANCE X302-7 EEC (230V, coated) | 0 | — |
| Siemens SCALANCE X302-7 EEC (230V) | 0 | — |
| Siemens SCALANCE X302-7 EEC (24V, coated) | 0 | — |
| Siemens SCALANCE X302-7 EEC (24V) | 0 | — |
| Siemens SCALANCE X302-7 EEC (2x 230V, coated) | 0 | — |
| Siemens SCALANCE X302-7 EEC (2x 230V) | 0 | — |
| Siemens SCALANCE X302-7 EEC (2x 24V, coated) | 0 | — |
| Siemens SCALANCE X302-7 EEC (2x 24V) | 0 | — |
| Siemens SCALANCE X304-2FE | 0 | — |
| Siemens SCALANCE X306-1LD FE | 0 | — |
| Siemens SCALANCE X307-2 EEC (230V, coated) | 0 | — |
| Siemens SCALANCE X307-2 EEC (230V) | 0 | — |
| Siemens SCALANCE X307-2 EEC (24V, coated) | 0 | — |
| Siemens SCALANCE X307-2 EEC (24V) | 0 | — |
| Siemens SCALANCE X307-2 EEC (2x 230V, coated) | 0 | — |
| Siemens SCALANCE X307-2 EEC (2x 230V) | 0 | — |
| Siemens SCALANCE X307-2 EEC (2x 24V, coated) | 0 | — |
| Siemens SCALANCE X307-2 EEC (2x 24V) | 0 | — |
| Siemens SCALANCE X307-3 | 0 | — |
| Siemens SCALANCE X307-3LD | 0 | — |
| Siemens SCALANCE X308-2 | 0 | — |
| Siemens SCALANCE X308-2 RD (inkl. SIPLUS variants) | 0 | — |
| Siemens SCALANCE X308-2LD | 0 | — |
| Siemens SCALANCE X308-2LH | 0 | — |
| Siemens SCALANCE X308-2LH+ | 0 | — |
| Siemens SCALANCE X308-2M | 0 | — |
| Siemens SCALANCE X308-2M PoE | 0 | — |
| Siemens SCALANCE X308-2M TS | 0 | — |
| Siemens SCALANCE X310 | 0 | — |
| Siemens SCALANCE X310FE | 0 | — |
| Siemens SCALANCE X320-1 FE | 0 | — |
| Siemens SCALANCE X320-1-2LD FE | 0 | — |
| Siemens SCALANCE X408-2 | 0 | — |
| Siemens SCALANCE XF204 | 0 | — |
| Siemens SCALANCE XF204-2 | 0 | — |
| Siemens SCALANCE XF206-1 | 0 | — |
| Siemens SCALANCE XF208 | 0 | — |
| Siemens SCALANCE XM408-4C | 0 | — |
| Siemens SCALANCE XM408-4C (L3 int.) | 0 | — |
| Siemens SCALANCE XM408-8C | 0 | — |
| Siemens SCALANCE XM408-8C (L3 int.) | 0 | — |
| Siemens SCALANCE XM416-4C | 0 | — |
| Siemens SCALANCE XM416-4C (L3 int.) | 0 | — |
| Siemens SCALANCE XR324-12M (230V, ports on front) | 0 | — |
| Siemens SCALANCE XR324-12M (230V, ports on rear) | 0 | — |
| Siemens SCALANCE XR324-12M (24V, ports on front) | 0 | — |
| Siemens SCALANCE XR324-12M (24V, ports on rear) | 0 | — |
| Siemens SCALANCE XR324-12M TS (24V) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (24V, ports on front) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (24V, ports on rear) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear) | 0 | — |
| Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front) | 0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.