SIEMENS Device Null Pointer Dereference in IPv4 Request Parsing
CVE-2025-40833 Published on May 12, 2026

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.

NVD

Weakness Type

NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.

Products Associated with CVE-2025-40833

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Siemens Sinumerik 840d Sl

Affected Versions

Siemens IE/PB LINK HA:

Before * is affected.

Siemens IE/PB link PN IO:

Before * is affected.

Siemens RUGGEDCOM RM1224 LTE(4G) EU:

Before V8.3 is affected.

Siemens RUGGEDCOM RM1224 LTE(4G) NAM:

Before V8.3 is affected.

Siemens SCALANCE M804PB:

Before V8.3 is affected.

Siemens SCALANCE M812-1 ADSL-Router:

Before V8.3 is affected.

Siemens SCALANCE M812-1 ADSL-Router:

Before V8.3 is affected.

Siemens SCALANCE M816-1 ADSL-Router:

Before V8.3 is affected.

Siemens SCALANCE M816-1 ADSL-Router:

Before V8.3 is affected.

Siemens SCALANCE M826-2 SHDSL-Router:

Before V8.3 is affected.

Siemens SCALANCE M874-2:

Before V8.3 is affected.

Siemens SCALANCE M874-3:

Before V8.3 is affected.

Siemens SCALANCE M874-3 3G-Router (CN):

Before V8.3 is affected.

Siemens SCALANCE M876-3:

Before V8.3 is affected.

Siemens SCALANCE M876-3 (ROK):

Before V8.3 is affected.

Siemens SCALANCE M876-4:

Before V8.3 is affected.

Siemens SCALANCE M876-4 (EU):

Before V8.3 is affected.

Siemens SCALANCE M876-4 (NAM):

Before V8.3 is affected.

Siemens SCALANCE MUB852-1 (A1):

Before V8.3 is affected.

Siemens SCALANCE MUB852-1 (B1):

Before V8.3 is affected.

Siemens SCALANCE MUM853-1 (A1):

Before V8.3 is affected.

Siemens SCALANCE MUM853-1 (B1):

Before V8.3 is affected.

Siemens SCALANCE MUM853-1 (EU):

Before V8.3 is affected.

Siemens SCALANCE MUM856-1 (A1):

Before V8.3 is affected.

Siemens SCALANCE MUM856-1 (B1):

Before V8.3 is affected.

Siemens SCALANCE MUM856-1 (CN):

Before V8.3 is affected.

Siemens SCALANCE MUM856-1 (EU):

Before V8.3 is affected.

Siemens SCALANCE MUM856-1 (RoW):

Before V8.3 is affected.

Siemens SCALANCE S615 EEC LAN-Router:

Before V8.3 is affected.

Siemens SCALANCE S615 LAN-Router:

Before V8.3 is affected.

Siemens SCALANCE SC622-2C:

Before * is affected.

Siemens SCALANCE SC626-2C:

Before * is affected.

Siemens SCALANCE SC632-2C:

Before * is affected.

Siemens SCALANCE SC636-2C:

Before * is affected.

Siemens SCALANCE SC642-2C:

Before * is affected.

Siemens SCALANCE SC646-2C:

Before * is affected.

Siemens SCALANCE W1748-1 M12:

Before * is affected.

Siemens SCALANCE W1748-1 M12:

Before * is affected.

Siemens SCALANCE W1788-1 M12:

Before * is affected.

Siemens SCALANCE W1788-2 EEC M12:

Before * is affected.

Siemens SCALANCE W1788-2 M12:

Before * is affected.

Siemens SCALANCE W1788-2IA M12:

Before * is affected.

Siemens SCALANCE W721-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W721-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W722-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W722-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W722-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W734-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W734-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W734-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W734-1 RJ45 (USA):

Before V6.6.0 is affected.

Siemens SCALANCE W738-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W738-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W748-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W748-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W748-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W748-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W761-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W761-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W774-1 RJ45 (USA):

Before V6.6.0 is affected.

Siemens SCALANCE W778-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W778-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W778-1 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W778-1 M12 EEC (USA):

Before V6.6.0 is affected.

Siemens SCALANCE W786-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2 SFP:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2 SFP:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2IA RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W786-2IA RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W788-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W788-1 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W788-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W788-1 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 M12:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 M12 EEC:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE W788-2 RJ45:

Before V6.6.0 is affected.

Siemens SCALANCE WAB762-1:

Before V3.2.0 is affected.

Siemens SCALANCE WAM763-1:

Before V3.2.0 is affected.

Siemens SCALANCE WAM763-1 (ME):

Before V3.2.0 is affected.

Siemens SCALANCE WAM763-1 (US):

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1:

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1 (ME):

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1 (US):

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1 EEC:

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1 EEC (ME):

Before V3.2.0 is affected.

Siemens SCALANCE WAM766-1 EEC (US):

Before V3.2.0 is affected.

Siemens SCALANCE WUB762-1:

Before V3.2.0 is affected.

Siemens SCALANCE WUB762-1 iFeatures:

Before V3.2.0 is affected.

Siemens SCALANCE WUM763-1:

Before V3.2.0 is affected.

Siemens SCALANCE WUM763-1:

Before V3.2.0 is affected.

Siemens SCALANCE WUM763-1 (US):

Before V3.2.0 is affected.

Siemens SCALANCE WUM763-1 (US):

Before V3.2.0 is affected.

Siemens SCALANCE WUM766-1:

Before V3.2.0 is affected.

Siemens SCALANCE WUM766-1 (ME):

Before V3.2.0 is affected.

Siemens SCALANCE WUM766-1 (USA):

Before V3.2.0 is affected.

Siemens SCALANCE X204-2:

Before * is affected.

Siemens SCALANCE X204-2FM:

Before * is affected.

Siemens SCALANCE X204-2LD:

Before * is affected.

Siemens SCALANCE X204-2LD TS:

Before * is affected.

Siemens SCALANCE X204-2TS:

Before * is affected.

Siemens SCALANCE X206-1:

Before * is affected.

Siemens SCALANCE X206-1LD:

Before * is affected.

Siemens SCALANCE X208:

Before * is affected.

Siemens SCALANCE X208PRO:

Before * is affected.

Siemens SCALANCE X212-2:

Before * is affected.

Siemens SCALANCE X212-2LD:

Before * is affected.

Siemens SCALANCE X216:

Before * is affected.

Siemens SCALANCE X224:

Before * is affected.

Siemens SCALANCE X302-7 EEC (230V, coated):

Before * is affected.

Siemens SCALANCE X302-7 EEC (230V):

Before * is affected.

Siemens SCALANCE X302-7 EEC (24V, coated):

Before * is affected.

Siemens SCALANCE X302-7 EEC (24V):

Before * is affected.

Siemens SCALANCE X302-7 EEC (2x 230V, coated):

Before * is affected.

Siemens SCALANCE X302-7 EEC (2x 230V):

Before * is affected.

Siemens SCALANCE X302-7 EEC (2x 24V, coated):

Before * is affected.

Siemens SCALANCE X302-7 EEC (2x 24V):

Before * is affected.

Siemens SCALANCE X304-2FE:

Before * is affected.

Siemens SCALANCE X306-1LD FE:

Before * is affected.

Siemens SCALANCE X307-2 EEC (230V, coated):

Before * is affected.

Siemens SCALANCE X307-2 EEC (230V):

Before * is affected.

Siemens SCALANCE X307-2 EEC (24V, coated):

Before * is affected.

Siemens SCALANCE X307-2 EEC (24V):

Before * is affected.

Siemens SCALANCE X307-2 EEC (2x 230V, coated):

Before * is affected.

Siemens SCALANCE X307-2 EEC (2x 230V):

Before * is affected.

Siemens SCALANCE X307-2 EEC (2x 24V, coated):

Before * is affected.

Siemens SCALANCE X307-2 EEC (2x 24V):

Before * is affected.

Siemens SCALANCE X307-3:

Before * is affected.

Siemens SCALANCE X307-3:

Before * is affected.

Siemens SCALANCE X307-3LD:

Before * is affected.

Siemens SCALANCE X307-3LD:

Before * is affected.

Siemens SCALANCE X308-2:

Before * is affected.

Siemens SCALANCE X308-2 RD (inkl. SIPLUS variants):

Before * is affected.

Siemens SCALANCE X308-2LD:

Before * is affected.

Siemens SCALANCE X308-2LD:

Before * is affected.

Siemens SCALANCE X308-2LH:

Before * is affected.

Siemens SCALANCE X308-2LH:

Before * is affected.

Siemens SCALANCE X308-2LH+:

Before * is affected.

Siemens SCALANCE X308-2LH+:

Before * is affected.

Siemens SCALANCE X308-2M:

Before * is affected.

Siemens SCALANCE X308-2M:

Before * is affected.

Siemens SCALANCE X308-2M PoE:

Before * is affected.

Siemens SCALANCE X308-2M PoE:

Before * is affected.

Siemens SCALANCE X308-2M TS:

Before * is affected.

Siemens SCALANCE X308-2M TS:

Before * is affected.

Siemens SCALANCE X310:

Before * is affected.

Siemens SCALANCE X310:

Before * is affected.

Siemens SCALANCE X310FE:

Before * is affected.

Siemens SCALANCE X310FE:

Before * is affected.

Siemens SCALANCE X320-1 FE:

Before * is affected.

Siemens SCALANCE X320-1-2LD FE:

Before * is affected.

Siemens SCALANCE X408-2:

Before * is affected.

Siemens SCALANCE XF204:

Before * is affected.

Siemens SCALANCE XF204-2:

Before * is affected.

Siemens SCALANCE XF206-1:

Before * is affected.

Siemens SCALANCE XF208:

Before * is affected.

Siemens SCALANCE XM408-4C:

Before * is affected.

Siemens SCALANCE XM408-4C (L3 int.):

Before * is affected.

Siemens SCALANCE XM408-8C:

Before * is affected.

Siemens SCALANCE XM408-8C (L3 int.):

Before * is affected.

Siemens SCALANCE XM416-4C:

Before * is affected.

Siemens SCALANCE XM416-4C (L3 int.):

Before * is affected.

Siemens SCALANCE XR324-12M (230V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-12M (230V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-12M (230V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-12M (230V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-12M (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-12M (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-12M (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-12M (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-12M TS (24V):

Before * is affected.

Siemens SCALANCE XR324-12M TS (24V):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (230V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (230V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (230V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (230V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M PoE (24V, ports on rear):

Before * is affected.

Siemens SCALANCE XR324-4M PoE TS (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR324-4M PoE TS (24V, ports on front):

Before * is affected.

Siemens SCALANCE XR524-8C, 1x230V:

Before * is affected.

Siemens SCALANCE XR524-8C, 1x230V (L3 int.):

Before * is affected.

Siemens SCALANCE XR524-8C, 24V:

Before * is affected.

Siemens SCALANCE XR524-8C, 24V (L3 int.):

Before * is affected.

Siemens SCALANCE XR524-8C, 2x230V:

Before * is affected.

Siemens SCALANCE XR524-8C, 2x230V (L3 int.):

Before * is affected.

Siemens SCALANCE XR526-8C, 1x230V:

Before * is affected.

Siemens SCALANCE XR526-8C, 1x230V (L3 int.):

Before * is affected.

Siemens SCALANCE XR526-8C, 24V:

Before * is affected.

Siemens SCALANCE XR526-8C, 24V (L3 int.):

Before * is affected.

Siemens SCALANCE XR526-8C, 2x230V:

Before * is affected.

Siemens SCALANCE XR526-8C, 2x230V (L3 int.):

Before * is affected.

Siemens SCALANCE XR528-6M:

Before * is affected.

Siemens SCALANCE XR528-6M (2HR2, L3 int.):

Before * is affected.

Siemens SCALANCE XR528-6M (2HR2):

Before * is affected.

Siemens SCALANCE XR528-6M (L3 int.):

Before * is affected.

Siemens SCALANCE XR552-12M:

Before * is affected.

Siemens SCALANCE XR552-12M (2HR2, L3 int.):

Before * is affected.

Siemens SCALANCE XR552-12M (2HR2):

Before * is affected.

Siemens SCALANCE XR552-12M (2HR2):

Before * is affected.

Siemens SIMATIC CFU DIQ:

Before V2.0.0 is affected.

Siemens SIMATIC CFU PA:

Before V2.0.0 is affected.

Siemens SIMATIC CFU PA:

Before V2.0.0 is affected.

Siemens SIMATIC ET 200pro IM 154-8 PN/DP CPU:

Before * is affected.

Siemens SIMATIC ET 200pro IM 154-8F PN/DP CPU:

Before * is affected.

Siemens SIMATIC ET 200pro IM 154-8FX PN/DP CPU:

Before * is affected.

Siemens SIMATIC ET 200S IM 151-8 PN/DP CPU:

Before * is affected.

Siemens SIMATIC ET 200S IM 151-8F PN/DP CPU:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1510SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP HA IM155-6 PN:

Before V1.3 is affected.

Siemens SIMATIC S7-1500 CPU 1511-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511F-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515F-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 314C-2 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 315-2 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 315F-2 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 315T-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 317-2 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 317F-2 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 317T-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 317TF-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 319-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-300 CPU 319F-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-400 CPU 412-2 PN V7:

Before * is affected.

Siemens SIMATIC S7-400 CPU 414-3 PN/DP V7:

Before * is affected.

Siemens SIMATIC S7-400 CPU 414F-3 PN/DP V7:

Before * is affected.

Siemens SIMATIC S7-400 CPU 416-3 PN/DP V7:

Before * is affected.

Siemens SIMATIC S7-400 CPU 416F-3 PN/DP V7:

Before * is affected.

Siemens SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants):

Before * is affected.

Siemens SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants):

Before V10.2 is affected.

Siemens SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants):

Before V8.3 is affected.

Siemens SIMIT UNIT V10:

Before * is affected.

Siemens SIMIT UNIT V11:

Before * is affected.

Siemens SINAMICS CBE20:

Before * is affected.

Siemens SINAMICS G115D:

Before * is affected.

Siemens SINAMICS G120 (incl. SIPLUS variants):

Before * is affected.

Siemens SINAMICS G120C:

Before * is affected.

Siemens SINAMICS G120D:

Before * is affected.

Siemens SINAMICS G120X:

Before * is affected.

Siemens SINAMICS G120XA:

Before * is affected.

Siemens SINAMICS G130:

Before * is affected.

Siemens SINAMICS G150:

Before * is affected.

Siemens SINAMICS S110:

Before * is affected.

Siemens SINAMICS S120 (incl. SIPLUS variants):

Before * is affected.

Siemens SINAMICS S150:

Before * is affected.

Siemens SINUMERIK 840D sl:

Before * is affected.

Siemens SIPLUS ET 200S IM 151-8 PN/DP CPU:

Before * is affected.

Siemens SIPLUS ET 200S IM 151-8F PN/DP CPU:

Before * is affected.

Siemens SIPLUS NET IE/PB link PN IO:

Before * is affected.

Siemens SIPLUS S7-300 CPU 314C-2 PN/DP:

Before * is affected.

Siemens SIPLUS S7-300 CPU 315-2 PN/DP:

Before * is affected.

Siemens SIPLUS S7-300 CPU 315F-2 PN/DP:

Before * is affected.

Siemens SIPLUS S7-300 CPU 317-2 PN/DP:

Before * is affected.

Siemens SIPLUS S7-300 CPU 317F-2 PN/DP:

Before * is affected.

Siemens SIPLUS S7-400 CPU 414-3 PN/DP V7:

Before * is affected.

Siemens SIPLUS S7-400 CPU 416-3 PN/DP V7:

Before * is affected.

Siemens SITOP PSU8600 1AC 20 A/4x5 A PN:

Before * is affected.

Siemens SITOP PSU8600 3AC 20 A PN:

Before * is affected.

Siemens SITOP PSU8600 3AC 20 A/4x5 A PN:

Before * is affected.

Siemens SITOP PSU8600 3AC 40 A PN:

Before * is affected.

Siemens SITOP PSU8600 3AC 40 A/4x10 A PN:

Before * is affected.

Siemens SITOP PSU8600 3AC 40 A/4x10A EIP:

Before * is affected.

Siemens SITOP UPS1600 10 A Ethernet/ PROFINET:

Before * is affected.

Siemens SITOP UPS1600 20 A Ethernet/ PROFINET:

Before * is affected.

Siemens SITOP UPS1600 40 A Ethernet/ PROFINET:

Before * is affected.

Siemens SITOP UPS1600 EX 20 A Ethernet PROFINET:

Before * is affected.

Exploit Probability

EPSS

0.04%

Percentile

12.09%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.

SIEMENS Device Null Pointer Dereference in IPv4 Request ParsingCVE-2025-40833 Published on May 12, 2026

Weakness Type

NULL Pointer Dereference

Products Associated with CVE-2025-40833

Affected Versions

Exploit Probability

SIEMENS Device Null Pointer Dereference in IPv4 Request Parsing
CVE-2025-40833 Published on May 12, 2026