CVE-2025-40833

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(high)
EPSS: 16.7%
KEV: Not listed

Published

May 12, 2026

Last Modified

May 12, 2026

Advisory Details (1)

Auto-updated May 12, 2026

No patch confirmed yet.

generic

SSA-392349

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2025-40833?

CVE-2025-40833 is a high vulnerability 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.

When was CVE-2025-40833 disclosed?

CVE-2025-40833 was first published in the National Vulnerability Database on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-40833 actively exploited?

CVE-2025-40833 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-40833?

CVE-2025-40833 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2025-40833?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-40833, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-40833

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

SSA-392349

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-40833?

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Advisory Details (1)

Frequently asked(5)

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