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 r...
Affects 0 products across 2 vendors.
Software attempts to use a NULL pointer, causing a crash and denial of service.
CVE-2025-40833 affects multiple Siemens industrial devices, leading to a potential denial of service condition. Siemens has released updates for several affected products and is preparing further fixes. Immediate action is recommended to mitigate the risk of service disruption.
BSID: BS-2026-GLOBAL-259381-H • Model: Qwen/Qwen2.5-72B-Instruct-AWQ • Confidence: HIGH
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| CVE ID | CVE-2025-40833 |
|---|---|
| BSID | BS-2026-GLOBAL-259381-H BreachSpider Global ID |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2026-05-12 |
| Last Modified | 2026-07-14 |
| ICS Relevance | 55% |
| Weakness (CWE) | |
| Verticals | |
| Source | NVD |
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.
Source: NIST NVD / MITRE CVE Database
The vulnerability can be exploited remotely without authentication, requiring no user interaction. An attacker can cause a denial of service condition by sending specially crafted network packets to the affected devices.
Exploitation Likelihood: MEDIUM
| Vendor | Product | Fixed Version |
|---|---|---|
| Fujitsu-Siemens | — | — |
| Siemens | — | — |
No patch URL on record. Monitor vendor security advisories directly.
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
Implement network segmentation and access controls to limit exposure to the affected devices. Monitor network traffic for unusual patterns that may indicate an attack.
No reliable network detection signature exists for this vulnerability class — apply the compensating controls above and the vendor patch. SAGE only publishes a network rule when a concrete on-the-wire signature can be grounded in the advisory.
This CVE violates CIP-007-R2 as it allows an attacker to disrupt the availability of critical cyber assets, which is a key requirement for maintaining the reliability of the bulk electric system.
This CVE maps to SR 7.6 as it involves a vulnerability that can be exploited to cause a denial of service, which is a critical security requirement for ensuring the availability and reliability of industrial control systems.
Virtual patch generated by CITED Relevance SAGE. Validate in isolated environment before production deployment. Compensating control only - does not replace vendor patch.
SAGE Enrichment Record — provenance & audit hash
| Model | Qwen/Qwen2.5-72B-Instruct-AWQ |
|---|---|
| Confidence | HIGH |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | ef2c6dafee0335b9f601a13e795b51ce5a276605364e05f3e17332759235511d55030d6ebc2c35aa5d06b000cd290ebb5f121a41397a4e36bfdd31e36ae6d99d |
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