CVE record · CVE-2025-40833

NULL pointer dereference in Siemens IE/PB LINK HA and others

CVSS 8.7 HighEPSS 0.0032 · 25th percentile

Published by the CVE Program (CNA: siemens) at 12 May 2026, 08:20 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Siemens	IE/PB LINK HA	affected before V4.1.2 custom Other versions: unknown
Siemens	IE/PB link PN IO	affected before * custom Other versions: unknown
Siemens	RUGGEDCOM RM1224 LTE(4G) EU	affected before V8.3 custom Other versions: unknown
Siemens	RUGGEDCOM RM1224 LTE(4G) NAM	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M804PB	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M812-1 ADSL-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M812-1 ADSL-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M816-1 ADSL-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M816-1 ADSL-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M826-2 SHDSL-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M874-2	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M874-3	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M874-3 3G-Router (CN)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M876-3	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M876-3 (ROK)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M876-4	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M876-4 (EU)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE M876-4 (NAM)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUB852-1 (A1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUB852-1 (B1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM853-1 (A1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM853-1 (B1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM853-1 (EU)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM856-1 (A1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM856-1 (B1)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM856-1 (CN)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM856-1 (EU)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE MUM856-1 (RoW)	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE S615 EEC LAN-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE S615 LAN-Router	affected before V8.3 custom Other versions: unknown
Siemens	SCALANCE SC622-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE SC626-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE SC632-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE SC636-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE SC642-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE SC646-2C	affected before V3.2 custom Other versions: unknown
Siemens	SCALANCE W1748-1 M12	affected before * custom Other versions: unknown
Siemens	SCALANCE W1748-1 M12	affected before * custom Other versions: unknown
Siemens	SCALANCE W1788-1 M12	affected before * custom Other versions: unknown
Siemens	SCALANCE W1788-2 EEC M12	affected before * custom Other versions: unknown

And 265 more products. The full list is on the CVE record.

Identifiers: CVE-2025-40833
CNA: siemens
Weakness (CWE): CWE-476
Tags: Siemens IE/PB LINK HA
Siemens IE/PB link PN IO
Siemens RUGGEDCOM RM1224 LTE(4G) EU
Siemens RUGGEDCOM RM1224 LTE(4G) NAM
Siemens SCALANCE M804PB
Siemens SCALANCE M812-1 ADSL-Router
Siemens SCALANCE M816-1 ADSL-Router
Siemens SCALANCE M826-2 SHDSL-Router
Memory corruption
Published: 12 May 2026
Updated: 11 Aug 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (siemens)
8.7	High	4.0	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	CNA (siemens)Used for this record

CISA KEV Not listed.
EPSS 0.0032, the 25th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

cert-portal.siemens.com/productcert/html/ssa-392349.html

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.